在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

CanvasRenderingContext2D 方法 strokeText() , part of the Canvas 2D API, strokes — that is, draws the outlines of — the characters of a text string at the specified coordinates. An optional parameter allows specifying a maximum width for the rendered text, which the 用户代理 will achieve by condensing the text or by using a lower font size.

This method draws directly to the canvas without modifying the current path, so any subsequent fill() or stroke() calls will have no effect on it.

使用 fillText() method to fill the text characters rather than having just their outlines drawn.

句法

CanvasRenderingContext2D.strokeText(text, x, y [, maxWidth]);
					

参数

text

DOMString specifying the text string to render into the context. The text is rendered using the settings specified by font , textAlign , textBaseline ，和 direction .

x

The x-axis coordinate of the point at which to begin drawing the text.

y

The y-axis coordinate of the point at which to begin drawing the text.

maxWidth 可选

The maximum width the text may be once rendered. If not specified, there is no limit to the width of the text. However, if this value is provided, the user agent will adjust the kerning, select a more horizontally condensed font (if one is available or can be generated without loss of quality), or scale down to a smaller font size in order to fit the text in the specified width.

返回值

undefined .

范例

Drawing text outlines

This example writes the words "Hello world" using the strokeText() 方法。

HTML

First, we need a canvas to draw into. This code creates a context 400 pixels wide and 150 pixels high.

<canvas id="canvas" width="400" height="150"></canvas>
						

JavaScript

The JavaScript code for this example follows.

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
ctx.font = '50px serif';
ctx.strokeText('Hello world', 50, 90);
						

This code obtains a reference to the <canvas> , then gets a reference to its 2D graphics context.

With that in hand, we set the font to 50-pixel-tall "serif" (the user's default serif font), then call strokeText() to draw the text "Hello world," starting at the coordinates (50, 90).

结果

Restricting the text size

This example writes the words "Hello world," restricting its width to 140 pixels.

HTML

<canvas id="canvas" width="400" height="150"></canvas>
						

JavaScript

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
ctx.font = '50px serif';
ctx.strokeText('Hello world', 50, 90, 140);
						

结果

规范

规范	状态	注释
HTML 实时标准 The definition of 'CanvasRenderingContext2D.strokeText' in that specification.	实时标准

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
strokeText	Chrome Yes	Edge 12	Firefox 3.5	IE 9	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

完整支持

另请参阅

• 绘制文本
• The interface defining this method: CanvasRenderingContext2D
• CanvasRenderingContext2D.fillText()

元数据

• 最后修改： Apr 3, 2020

相关话题

1. CanvasRenderingContext2D
2. 特性

   1. canvas
   2. currentTransform
   3. direction
   4. fillStyle
   5. filter
   6. font
   7. globalAlpha
   8. globalCompositeOperation
   9. imageSmoothingEnabled
   10. imageSmoothingQuality
   11. lineCap
   12. lineDashOffset
   13. lineJoin
   14. lineWidth
   15. miterLimit
   16. shadowBlur
   17. shadowColor
   18. shadowOffsetX
   19. shadowOffsetY
   20. strokeStyle
   21. textAlign
   22. textBaseline
3. 方法

   1. addHitRegion()
   2. arc()
   3. arcTo()
   4. beginPath()
   5. bezierCurveTo()
   6. clearHitRegions()
   7. clearRect()
   8. clip()
   9. closePath()
   10. createImageData()
   11. createLinearGradient()
   12. createPattern()
   13. createRadialGradient()
   14. drawFocusIfNeeded()
   15. drawImage()
   16. drawWidgetAsOnScreen()
   17. drawWindow()
   18. ellipse()
   19. fill()
   20. fillRect()
   21. fillText()
   22. getImageData()
   23. getLineDash()
   24. getTransform()
   25. isPointInPath()
   26. isPointInStroke()
   27. lineTo()
   28. measureText()
   29. moveTo()
   30. putImageData()
   31. quadraticCurveTo()
   32. rect()
   33. removeHitRegion()
   34. resetTransform()
   35. restore()
   36. rotate()
   37. save()
   38. scale()
   39. scrollPathIntoView()
   40. setLineDash()
   41. setTransform()
   42. stroke()
   43. strokeRect()
   44. strokeText()
   45. transform()
   46. translate()