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This feature is obsolete.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。