Measuretext javascript. @user3190532 and @philipp correctly say that context.

Measuretext javascript Read about the advantages of the method over other methods. Interactive API reference for the JavaScript TextMetrics Object. The text is added to the container programatically so I could do the test after that is done. Designed to work in any modern JavaScript runtime. Conclusion To measure text width and height without rendering with JavaScript, we can put the text in a canvas element and measure it there. My sample project involves getting the value of the text-box, and validating according to it's length. Mar 31, 2020 · I am trying to add background to a sentence and draw it on canvas. Below you can see our completed resize function. clientHeight, then jQuery method $(node). Feb 2, 2025 · The getComputedTextLength() method of the SVGTextContentElement interface represents the computed length for the text within the element. measureText('Sivakumar Tadisetti') I am using font as bold 15px "Open Sans", serif Issue: Sometimes measureTex The code uses measureText to get the actual width in pixels, so it accounts for the different widths of the characters? Unless I'm missing something, in which case do feel free to explain that to me. The three methods being compared are: Is there a way to measure text in javascript? I want to determine if the text has overflowed the container and then perform an operation based upon that eventuality. And we get the font height with context. window. Finally, we return the measured width. Dynamic Width Calculation: The button’s width is set to the measured text width plus extra padding (20px in the example) for readability. This project is part of #CreateWeekly, my attempt to create something new publicly every week in 2020. And for GDI+, feel free to use the Graphics. Using canvases of course! HTML Canvas has an awesome built-in method called measureText that can return the pixel width of specified text. It provides a wide range of functionalities, including the ability to create shapes, images, and text. You can use it as a template to jumpstart your development with this pre-built solution. context. width to get the width of the text. We would like to show you a description here but the site won’t allow us. How can I do to get the length of a string in pixel ? Update: Thanks to nrabinowitz. @phrogz I'm sure that Firefox used to support text along a path. 💻 JavaScript - measure text size on HTML canvas element - Dirask 0 - 0 Mar 1, 2013 · The result is the height of the box containing the text (the one you can see if you select the text with the mouse), which is higher then the real height of the text. Inside the function, we create a new <canvas> element and obtain its 2D rendering context using getContext('2d'). Tip: Use this method if you need to know the width of a text, before writing it on the canvas. In this article, we would like to show you how to measure text width using JavaScript. ‍ Invoke the `measureText ()` method of the canvas context with the desired string and font settings. This function however only provides you with the width of the text - not the height. 0. Jun 26, 2021 · We are developing a complex editor using blazor for building graphs, however during the layout we need to measure the width (and sometimes height) of text. It will return an object that contains information about the measured text. format flags, font, available width, etc. Js. measureText() Returns a TextMetrics object. Apr 22, 2024 · 文字列の幅と高さを計算 Canvas上での文字列の幅と高さは、コンテキストのmeasureText ()メソッドを使用します。 measureText ()メソッドは幅を取得するケースが多いですが、高さも取得できます。 measureText ()メソッド 文字列を指定すると、文字列の枠情報を取得できます。 Nov 28, 2014 · 1 It seems that both measureText and "DOM element method" still do not return real text width. width give different values for different text that takes up the same width? I have a canvas where I am filling text to the width of the canvas and then starting a new line. fillStyle Oct 12, 2015 · But to center vertically we need to use ctx. measureText() メソッドは、測定したテキストの情報（例えば幅など）を持つ TextMetrics オブジェクトを返します。 Jul 22, 2016 · You can create some inline element (span, for example), set your string as element's content (innerHTML), insert it into document (append to some element) and get it's width (clientWidth). All CSS units work here. measureText assumes the lineHeight to be a unitless CSS value if provided either a Measuring text on canvas The measureText () method measures the width of a given text in pixels and returns a textMetrics object. Measure text height on an HTML5 canvas element Javascript Web Development Front End Scripts Jan 3, 2014 · In Javascript, I have a certain string, and I would like to somehow measure how much space (in pixels) it will take within a certain element. Start using text-metrics in your project by running `npm i text-metrics`. Below is the code: ctx. The user agent will ensure that the text does not extend farther than that distance, using the method or methods specified by the lengthAdjust attribute. 1, last published: a year ago. height() It gi Feb 14, 2022 · Measure Text Width in Canvas | Canvas API Javascript Tutorial For Beginners Part 28In this video series we explore how to use the canvas API in javascript to The W3Schools online code editor allows you to edit code and view the result in your browser The measureText () method returns an object that contains the width of the specified text, in pixels. Description The length property returns the length of a string. The following code snippet shows how you can measure a text and get its width. An efficient text measurement set for the browser. font. Jul 9, 2015 · Is there any way to get an estimate for text width without rendering the actual elements? Something like canvas TextMetrics? Case: I need to estimate element heights for ReactList. Text, myControl. createElement('canvas') let ctx = canvas. Additionally, the documented return Jun 24, 2025 · This page shows how you can measure the height of text by using HTML DOM elements instead of the built-in canvas measureText() function. g. Possible values: butt (default), round, square. Ensure that you set the font property on the context to match the style in which the string will be displayed. Then if that width is too big, reduce the font size until it fits. The next three lines show how to get from the returned value from the correct value; it looks like a lot of the math inside the implementation isn't necessary. This method can be used to get the width of the text before writing it on canvas. It's an easy way to measure string length and is widely used for validation and manipulation tasks in web development. Normally this isn't so bad - except when you absolutely need the height - it's not available. The HTML Canvas measureText () method of Canvas API from the CanvasRenderingContext2D interface returns text width of the text drawn using context object from the Canvas element. Conclusion Accurately To calculate text width, we can use the measureText () method in JavaScript. As a result, tSize should be {width: 154. measureText Feb 19, 2014 · Bits of your solution in each answer! @foz correctly says that context. 1. measureText () function. measureText() Returns a TextMetrics object containing the width, in pixels, that the specified text will be when drawn in the current text style. Oct 4, 2024 · The JavaScript String. Latest version: 4. Measures multiline text if provided an array. length, charCodeAt, localeCompare, toString, and more. 💻 JavaScript - measure text size on HTML canvas element - Dirask 0 0 May 31, 2016 · I would like to calculate a text's width before rendering it (for the purpose of laying out the texts). The APIs in the browser return a height that is much higher than visually apparent on the screen so that doesn't help you center it. Learn more at pdf-lib. The following are character strings tested and the resulting widths: &quot;888&quot; = 50. measureText The CanvasRenderingContext2D. Is there a way to do the same but get the text's height? just a thought to myself - ma The provided benchmark measures the performance of three different methods to measure the width of a single string of text on a canvas element in JavaScript. The measureText () method returns an object that contains the width of the specified text, in pixels. The results are sometimes incorrect. Aug 22, 2008 · While you could create a simple function which would take one parameter I have decided to benefit of the possibility of extending JavaScript classes using the prototype namespace. Oct 13, 2023 · A canvas element can be added to the HTML using <canvas> tag or using JavaScript we can add it through the 'document' object 'createElement' method. height, then node. Based Sep 26, 2023 · Sometimes, we want to measure text width and height without rendering with JavaScript. Read more about the length property in our JavaScript String length Reference. fontFamily: string the font family of the text. measureText('Hello world'): This method measures the width of a specific string using the 2D drawing context of the HTML canvas element. Feb 22, 2020 · How can I fit a single-line string of text to a precise width on an html5 canvas? What I've tried so far is to write text at an initial font size, measure the text's width with measureText(my_text) Jun 16, 2013 · I have this code and it works: I am trying to learn JavaScript before becoming addicted to JQuery. It can be used to detect the text width before writing it on canvas. By using this function you can get the height of your text which the canvas API function does not provide. The <canvas> element defines a bitmapped area in an HTML page. Jun 12, 2023 · The measureText () method is used to return an object that represents the width of the specified text in terms of pixels. MeasureText(myControl. In canvas, the measureText () method is used to measure width of the text content. In a complex DAG this can require 1000s o Sep 15, 2021 · I have a third party Blazor WebAssembly component with a width property that I want to set based on the width of a string that will be displayed within the component. measureText() method returns a TextMetrics object that contains information about the measured text (such as its width, for example). Quick solution: Solution explaination Canvas context object provides simp TextMetrics also exports measureWidth function, but it is at the moment equivalent to the result of canvas. I like this method for getting text width, because it doesn't mutate the DOM function getTextWidth(text, font) { // re-use c The JavaScript approach: Output SVG components that must be arranged horizontally or vertically as separate <svg> elements with no width or height specified. Font); and comparing the result to the size of the control to check if text fits. Jun 16, 2020 · A second solution often leveraged is through HTML canvas' measureText. Because we have called it after making changes on ctx, it will be different whenever we change properties on ctx (like ctx. Fortunately, this can be solved by using the below function. width, but with the height of the string. Having defined the function as above you can now retrieve the length of any string by calling: var s = "Some text"; var len = s. measureText(). Mar 22, 2025 · In the case you need to obtain more details about the text, the following method allows you to measure it. Sep 19, 2021 · Sometimes, we’ve to calculate the width of text content in our JavaScript code. font = '11pt Calibri' ctx. length property returns the number of characters in a string, including spaces and special characters. How can I center the text vertically? In another words, I need to bring out a variable from the function "wrapText" in order to use it to calculate the position of the t Jun 16, 2016 · The measureText () method takes one argument, text. Or click a specific value to see the result: The measureText () method of the JavaScript DOM object returned by the getContext ("2d") method applied to the HTML <canvas> element returns an object indicating the width of the specified text. It might just be a fantasy though. measureText will calculate the text width to do manual centering. False negative where TextRenderer reports a width Feb 5, 2011 · Let's say I have the string "Hello". The Canvas API allows JavaScript to draw graphics on the canvas. When the method is invoked, the user agent must run the text preparation algorithm, passing it text and the object implementing the CanvasText interface, and then using the returned inline box must create a new TextMetrics object with its attributes set as described [as follows]: Oct 10, 2017 · EDIT: originally I checked only desktop browsers - but with mobile browsers, the picture is even more complicated. Aug 3, 2021 · The measureText() method returns an object that contains the width of the specified text, in pixels. But context2d. It Measure Text Height in Canvas | Canvas API Javascript Tutorial For Beginners Part 29 In this video series we explore how to use the canvas API in javascript to draw shapes, lines and objects Apr 21, 2012 · I'm currently working with SVG. When measuring text on a single line, if the proposedSize parameter represents a Size with a height dimension greater than Int32. I'm finding that different texts that take up the entire width of the canvas have different widths. Default 1. Is this possible without having to use a monospace typeface? If it's not built-in, my only idea is to create a table of widths for each Feb 4, 2025 · The TextMetrics interface represents the dimensions of a piece of text in the canvas; a TextMetrics instance can be retrieved using the CanvasRenderingContext2D. This approach uses the Range object to locate client rectangles. Jul 17, 2024 · measureText (text)メソッドは、テキストの描画幅を測定する際に使用します。 引数textは、幅を測定する文字列を表します。 measureText ()メソッドに文字列を指定すると、テキストの描画幅がCSSピクセルの単位で返ります。 返り値はwidth属性に代入されます。 測定されるのは、現在のフォントで Create and modify PDF documents in any JavaScript environment. getContext('2d') ctx. Read this JavaScript tutorial and learn about the best method of calculating the text width. Measure the exact height of text in the browser using JavaScript. In this article, we’ll look at how to calculate text content width in our JavaScript code. This library uses the HTML Canvas tag to render and measure some given text. The library I'm using here is called Raphaël and has become pretty standard for SVG-stuff on the web. Feb 22, 2021 · Learn how to calculate text width in JavaScript using various methods to measure and adjust text dimensions effectively. Sep 23, 2008 · I'd like to use JavaScript to calculate the width of a string. ,There are DOM methods that are used to calculate the text width; however in this tutorial, you will find the best method to do the task accordingly. clientHeight and clientWidth The clientHeight and clientWidth properties of an HTML element object lets us get the height and width of the element. To do that I'd Hi, my name is Erik 👋 I'm a software developer in Minneapolis ⛄ I created a game engine for the web excaliburjs. Luckily, through CSS hack-ardry ( seeTypographic Metrics for more ways to fix older implementations of using CSS measurements), we can find the height of the text through measuring the offsetHeight of a with the same font-properties: Dec 17, 2022 · Answer by Theodore Cuevas The measureText () method returns an object which represents the width of the given text in terms of pixels. Just use the Canvas. measureText to get the pixel width of any given text in the current font. This is commonly done using the Canvas API or by creating a hidden element with similar styling to measure the text. Introduction to Length of String in JS When it comes to programming in JavaScript, one of the most fundamental data types is the Jul 3, 2013 · What's happening in this code, is: we're creating an invisible SVG-element and rendering some text on it with any given font and text-size. 4 to obtain SVG width. Using getBBox() works on Chrome browsers but breaks using Firefox (NS_ERROR). Line styles The following methods and properties control how lines are drawn. Then we get the text element's bounding box to retrieve the string's rendered width and height. (actualBoundingBoxAscent - actualBoundingBoxDescent) / 2 is important, because for different fonts text can be differently aligned vertically. visualLength(); Why does context. I was quite surprised when I found out that ctx. May 10, 2013 · How do I find the length of string in pixels in javascript , if I know the font-size and font-family? Aug 17, 2022 · Ben Nadel demonstrates how to detect the line-wrapping of text content within a text-node in the DOM (Document Object Model) using JavaScript. Feb 20, 2017 · I want to be able to calculate the actual height occupied by a text (or span) element in a SVG. measureText(string). lineHeight: string|number the line height of the text. measureText. fontWeight = FONT_WEIGHT; ctx. This tutorial covers measuring text width and height for precise text placement and layout on your HTML5 canvases. Obtained through measureText (). Enhance your web development skills with this step-by-step tutorial. measureText and "OM element method" return very similar values :) Let's try to measure width of text consisting of single character 'y' and printed with 'italic 90px arial'. Sep 29, 2024 · The Canvas API in HTML5 is a powerful feature that allows developers to draw graphics on the web page using JavaScript. Aug 8, 2016 · Here's a compact version of my problem let canvas = document. I need to know the string length in pixels in order to do some alignment. Determines the width of the bounding box required to render the specified text with the current font settings. lineWidth Width of lines. But it seems all is well with the code, and this is a problem with iPhone's implementation of measureText. Mar 26, 2022 · In this example, we define a function called measureTextWidth() that takes the text and font as parameters. The result is logged to the console. measureText () method in JavaScript to detect the text width properly: Jul 23, 2025 · Then, check the width of the text using the measureText () method before writing to the canvas. As we have to find the height of the text that is written in the HTML canvas, we can use the ''textMetrics" objects measureText () property to calculate height of the text. Canvas measureText () Method Watch a demo of different values of the measureText () method. Includes code examples and best practices. measureText() method. Is there a way to get the real height with jQuery or plain JS? In the example I tried with This code creates a new canvas element, sets its font to Arial with a font size of 16 pixels, and then uses the measureText method to calculate the width of the text “Hello World”. measureText (text to be measured); Feb 5, 2022 · So I use "measureText" right now, but that function gets different sizes depending on the browser and on the font I use. In my case, I know the following: Container Width Font Font size All padding All margins Any and all other styling like line-height MeasureText uses the proposedSize and flags parameters to indicate the relationship of height to width when determining the text size. CanvasRenderingContext2D. It is likely to provide an accurate result, but may require more resources compared to other methods. measureText() 指定したテキストを現在のテキストスタイルで描画したときの幅をピクセル単位で表した情報を持つ、 TextMetrics オブジェクトを返します。 以下のコードスニペットは、テキストを測定して幅を得る方法を示しています。 Nov 9, 2012 · I am a JavaScript noob, so I won't be all that surprised if there is a simple fix. This string is obviously five characters in length, but what is its length in pixels? Is there an easy way to determine this length in JavaScript? I have though Sep 10, 2013 · Even though node-canvas now supports font registering and more precise font rendering, I noticed measureText still returns "significantly" different result comparing to some of the popular browser Jan 13, 2010 · Is there any way to determine the pixel length of a string in jQuery/JavaScript? Feb 27, 2022 · Answer by Azariah Holland The measureText () method returns an object which represents the width of the given text in terms of pixels. Jan 8, 2022 · And then we do the measure with the context. NET and TypeScript/JavaScript are my specialty Nov 23, 2024 · Explore how to calculate string width in JavaScript using the Canvas API and dynamic DOM measurement methods. Jun 26, 2023 · This guide covers the importance of string length in JavaScript and provides various techniques to measure, convert, compare, and modify string length using built-in methods and operators. So far this isn't so difficult because I can simply put a temporary invisible div into the DOM tree and check the offsetWidth and offsetHeight. Mar 11, 2013 · Before writing the actual text, use ctx. Learn how to use the Canvas API's `measureText ()` method in JavaScript. Limitations: This relies on JavaScript execution, so it may not work in headless environments. height doesn’t exist. measureText to get the width of some text if it would now be rendered on the canvas. Have observed the following two issues: Often when a Label is set to AutoSize, TextRenderer will report a width that is 1 pixel wider than the auto-sized width of the Control. Learn how to use length to enhance your JavaScript projects. I came across a strange issue with some browsers and its text rendering capabilit Does React/JavaScript (not Jquery) have any means of determining the physical length of a word in pixels without having to render the item to the dom and without putting the font type into a function? May 12, 2019 · I am using Canvas 2d context to calculate the width of the text Ex: canvas2DContext. Jul 12, 2025 · Calculating the width of text in JavaScript refers to determining the pixel width that a specific string of text will occupy when rendered in a browser. MeasureText() function and I divide this number by 1. At Plus QA we use React primarily for our front-end work but you could easily modify this function to work with your favorite JavaScript framework. Jun 26, 2018 · I need a function that does the exact same thing as ctx. Jul 29, 2021 · I want to measure the theoretical width of some to-be-rendered text. Another way to calculate text width in JavaScript is to use the offsetWidth property of a DOM element. On click on animate button, the text-background (red) drawn improperly on first word. style. 💻 JavaScript - measure text size on HTML canvas element - Dirask + 0 - 0 I'm working on some ECMAScript/JavaScript for an SVG file and need to get the width and height of a text element so I can resize a rectangle that surrounds it. 4 value is obtained by experiment relatively to my case ! Apr 30, 2017 · I"m using measureText() to display text one char at a time and it's givng me wrong values. MeasureString method. The usage was in backend web scraper that is crawling hundreds of pages every second and getting all TextRenderer. In many applications, especially gaming and interactive web applications, the measurement of text becomes crucial for designing layouts, […] Oct 6, 2022 · I am testing the context. js. Check it out! You can use context. How can I write a C# function MeasureText method for measuring it. . font). In this article, we’ll look at how to measure text width and height without rendering with JavaScript. Sep 25, 2025 · The CanvasRenderingContext2D. In HTML I would be able to use the offsetWidth and offsetHeight attributes on the element but it appears that those properties are unavailable. fontSize: string the size of the font. measureText (theText) ). The performance is akin to the above DOM manipulation. You can use the Canvas. A JavaScript component to measure the the width and height of SVG text. May 18, 2010 · I want to measure the size of a text in JavaScript. There is no other way to measure length of string in pixels because it depends on font style. We set the desired font for the context and use the measureText() method to measure the width of the text. What is the May 21, 2021 · Without Canvas (HTML5 element), how to measure TextMetrics like ascent, descent, CapHeight of font in JavaScript Asked 4 years, 6 months ago Modified 4 years, 6 months ago Viewed 641 times Measuring the width of canvas text is simple to do by using the context. Contains sizing information for text drawn in a CanvasRenderingContext2D. measureText in Chrome v106. ISTR, years ago, seeing a demo of text going around a circle using this feature, I also STR seeing a W3C canvas reference (for a future version I think) that allows a path to be given to the fillText () function - so maybe that's the same thing. I was thinking the only way would Jul 2, 2020 · Hi :) Recently I have found a really simple and handy method. 91 and am getting some inconsistent results. By default, only the spacing between characters is adjusted, but the glyph size can also be Aug 14, 2023 · Does anyone know how to get measureText, or a way to measure text in both node-canvas and browser canvas with roughly the same results? This is only for chrome (electron). Jul 23, 2025 · measureText() は、描画エンジンが計算する幅を返してくれるから、基本的には正確よ。 でもね、ブラウザやOS、フォントのレンダリング方法によっては、ピクセル単位で微妙な誤差が出ることがあるの。 Apr 22, 2024 · The read-only width property of the TextMetrics interface contains the text's advance width (the width of that inline box) in CSS pixels. Both methods offer different overloads allowing you to measure the text in a precise manner according to different criteria that you may have, e. See full list on erikonarheim. This function takes the text, whether it's bold or not, the Read more about strings in our JavaScript Strings Tutorial. If I use a reagular font, it works quite well. @user3190532 and @philipp correctly say that context. Mar 25, 2018 · I am using convas context measureText to get the width of my text on the canvas. My bit is to approximate the font height for somewhat-accurate vertical centering: A smart JavaScript module to measure text in pixels, choose the best fit font size or trim a sentence to fit a container - nbrunt/TextFit Explore this online Measure width of text in JavaScript sandbox and experiment with it yourself using our interactive online playground. Finally, the text is written on the canvas using the fillText () method. Measure and wrap text into lines for SVG in the browser. measureText method. 4970703125, height: 30} according to the console log. fillStyle = color; ctx. com, and all things . height does Sep 18, 2025 · The textLength attribute, available on SVG <text> and <tspan> elements, lets you specify the width of the space into which the text will draw. textAlign will automatically center your text horizontally. The length property of an empty string is 0. measureText accepts the following parameter object: text: string|Array<string> the text to measure. Sometimes you just want to know the height of some text, for instance if you want to center it nicely in a container. width "contains the text's advance width (the width of that inline box) in CSS pixels", which means the display size on the screen, meaning that if I call . When consoled measuretext() on that word, the 文字列の長さに応じてフォントサイズを縮小したり、省略表示したりできないかと思って調べてみました。 canvasのmeasureText()を使う方法と、DOMのoffsetWidthの値を使う方法があるようです。 canvasを使う方法 HTML5のcanvasを使い Sep 25, 2025 · CanvasRenderingContext2D. In resume, I compute text's width in pixels using TextRenderer. lineCap Type of endings on the end of lines. Basically what I have is an element that will float above everything else (like a tooltip), and I need to set its width manually through Javascript, so it will adjust to the text inside. scale(2, Dec 18, 2010 · ctx. I have this little script. The Jul 12, 2012 · I know I can use context. measureText and not really recommended to be used at the moment. For now, I achieve this by calculating the height of the bounding box of the object, but it takes the Jan 4, 2017 · Recently I needed a library in Javascript for measuring text pixel width in Node. 5249. HTML5 CanvasThe measureText () Method Nov 7, 2014 · The problem is that I can't figure out a way to have the exact height in pixels of the character that i'm drawing, and it's causes unwanted spaces between the center symbol to the one on top\down (for getting the width of a string there is the function context. I have a function drawChar(ch) that draws a character, a context "ctx", and a variable "cursor" that posi We would like to show you a description here but the site won’t allow us. font = `bolder italic ${fon Feb 22, 2017 · According to MDN, . Learn how to use . Tested in Node, Browser, Deno, and React Native environments. Without our JavaScript intervention, these would wind up with a default width and height in a browser that would not match the actual dimensions of the contents. measureText("myText"). Jan 8, 2014 · If there is any way you can measure height of text node without wrapping it? I've tried useless native method node. There are 8 other projects in the npm registry using text-metrics. MaxValue, the returned Size will be adjusted to reflect the actual height of the text. com Apr 3, 2025 · Learn how to use JavaScript Canvas measureText method effectively with examples and detailed explanations. the name of the form is membership. org 1 day ago · JavaScript Measurement: The offsetWidth property captures the total width of the text (including font and spacing). The Canvas API can draw shapes, lines, curves, boxes, text, and images, with colors, rotations, transparencies, and other pixel manipulations. This means we can pass text to this canvas method and then call that method to measure the text. cnuqo vmbis jjk ndgj tvqkb kiko aqt iwwrph twyp ics qqqrcl xoey izu lonbwldj zex