CanvasRenderingContext2D.clearHitRegions()

已废弃: This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

CanvasRenderingContext2D.clearHitRegions() 是 Canvas 2D API 在画布中删除所有点击区域的方法。

语法

void ctx.clearHitRegions();

示例

使用 clearHitRegions 方法

这仅是一段简单的使用 clearHitRegions 方法的代码片段。

HTML

<canvas id="canvas"></canvas>

JavaScript

var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");

// set some hit regions
ctx.addHitRegion({id: "eyes"});
ctx.addHitRegion({id: "nose"});
ctx.addHitRegion({id: "mouth"});

// remove them altogether from the canvas
ctx.clearHitRegions();

规范描述

Specification Status Comment
HTML Living Standard
CanvasRenderingContext2D.clearHitRegions
Living Standard

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes)[1] 38 (38) [2] 未实现 未实现 未实现
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 未实现 未实现 38.0 (38) [2] 未实现 未实现 未实现

兼容性注解

  • [1] 此特性需要一个特性标志。 设置 ExperimentalCanvasFeatures 标志为 true 进行启用。
  • [2] 此特性需要一个特性偏好设置。 在 about:config中设置 canvas.hitregions.enabled 为 true。

参见