解释 JavaScript 中的触摸事件
javascriptweb developmentobject oriented programming
当用户与触摸屏设备交互时,JavaScript 中的触摸事件会被触发。
以下是指针事件属性
事件 | 描述 |
---|---|
touchstart. | 当触摸点放在触摸表面上时会触发。 |
touchmove | 当触摸点沿触摸表面移动时会触发。 |
touchend | 当触摸点从触摸表面移除时会触发。 |
touchcancel | 当触摸点已中断 |
以下是 JavaScript 中触摸事件的代码 −
示例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Document</title> <style> body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 18px; color: blueviolet; font-weight: 500; } .sample { color: red; } </style> </head> <body> <h1>Touch events in JavaScript</h1> <div class="sample">Here is some sample text to touch</div> <div class="result"></div> <h3>Touch on the above paragraph to make output in the below paragraph visible</h3> <script> let resEle = document.querySelector(".result"); let sampleEle = document.querySelector(".sample"); sampleEle.addEventListener("touchstart", () => { resEle.innerHTML = "Touch start event has been triggered"; }); </script> </body> </html>
上述代码将产生以下输出 −
输出
关于触及段落 −