HTML5 device access 设备访问详解

const file = e.target.files[0]// 方式1 const url1 = window.URL.createObjectURL(file);let url2// 方式2const reader = new FileReader();reader.onload = (e) => {    url2 = e.target.result;};reader.readAsDataURL(file);

    if (navigator.geolocation){        navigator.geolocation.getCurrentPosition((position) => {            this.geolocation = `latitude:${position.coords.latitude},longitude:${position.coords.longitude}`        }, (err) => {            console.log(err);        }, {                enableHighAccuracy: true,                 maximumAge        : 30000,  // buffer memory timre                timeout           : 27000   // waiting time         })    } else {        alert('geolocation not supported!')    }

    window.addEventListener('deviceorientation',(doe) => {        this.absolute = doe.absolute //false 表示方向数据由设备本身坐标系提供        this.alpha = doe.alpha // 绕Z轴0-360 进入时手机水平正对的方向为0或360        this.beta = doe.beta // 绕X轴-180~180 描述由前向后旋转        this.gamma = doe.gamma // 绕Y轴-90~90 描述由左向右旋转    }, true)    // chrome v65 只支持accelerationIncludingGravity和interval（应该因为一些限制没有找到），其它浏览器最新版基本都支持    window.addEventListener('devicemotion', (dme) => {        this.acceleration = dme.acceleration        this.accelerationIncludingGravity = dme.accelerationIncludingGravity        this.rotationRate = dme.rotationRate        this.interval  = dme.interval     }, false)

    <button onclick="lockPointer();">锁住它!</button>    <div id="pointer-lock-element" style="width:500px;height:500px;background-color: red"></div>

    // 简单示例，将鼠标锁定在 pointer-lock-element 元素内    let = document.getElementById("pointer-lock-element");        document.addEventListener("mousemove", function(e) {        var movementX = e.movementX             movementY = e.movementY        // 打印鼠标移动的增量值。        console.log("X=" + movementX, "Y=" + movementY);    }, false);    function lockPointer() {        elem = document.getElementById("pointer-lock-element");        elem.requestPointerLock = elem.requestPointerLock    ||                            elem.mozRequestPointerLock ||                            elem.webkitRequestPointerLock;        elem.requestPointerLock();    }