js control keyframes

This article shares with you the code about js controlling keyframes. Friends in need can refer to it

createKeyFramesStyleSheetRules() {  //创建一个单独的css文件存放动画                let style = null,
                    sheet = null,
                    token = null,
                    dist  = null,
                    len   = null,
                    rules = null;
                len = this.loopSlideObjs.length-1;                //计算移动到最后一张图片需要的距离 
                dist = this.loopContainer.totalHeight - this.loopSlideObjs[len].height;                // 创建css文件
                style = document.createElement('style');
                style.setAttribute('type', 'text/css');                document.head.appendChild(style);                // 判断是否是webkit浏览器内核
                token = window.WebKitCSSKeyframesRule? '-webkit-':'';                // 添加keyframes动画的样式
                rules = '@' + token + 'keyframes imagesLoopMove{from{transform: translate3d(0,0px,0);}to{transform: translate3d(0,-' + dist + 'px,0);}}';
                sheet = style.sheet;
                sheet.insertRule(rules, 0);                // 给轮播图片添加动态的样式
                rules = '.loop-animate{animation: imagesLoopMove ' + 200 + 'ms linear 0ms infinite;}';
                sheet.insertRule(rules, 1);                this.animateStyle = style;                this.cssRule = sheet.cssRules[1];                this.animateTimeCurve();                console.group('function createKeyFramesStyleSheetRules');                console.log('dist:', dist);                console.log('style:', style);                console.log('sheet:', sheet);                console.log('token:', token);                console.log('cssRule:', this.cssRule);                console.groupEnd('End');
                len   = null;
                dist  = null;
                style = null;
                sheet = null;
                token = null;
                rules = null;
            }

Note, if it reports a DOMExpersion error, then it is a writing error in your cssRules, such as @keyframes missing a name, etc.

createKeyFramesStyleSheetRules() {  //创建一个单独的css文件存放动画                let style = null,
                    sheet = null,
                    token = null,
                    dist  = null,
                    len   = null,
                    rules = null;
                len = this.loopSlideObjs.length-1;                //计算移动到最后一张图片需要的距离 
                dist = this.loopContainer.totalHeight - this.loopSlideObjs[len].height;                // 创建css文件
                style = document.createElement('style');
                style.setAttribute('type', 'text/css');                document.head.appendChild(style);                // 判断是否是webkit浏览器内核
                token = window.WebKitCSSKeyframesRule? '-webkit-':'';                // 添加keyframes动画的样式
                rules = '@' + token + 'keyframes imagesLoopMove{from{transform: translate3d(0,0px,0);}to{transform: translate3d(0,-' + dist + 'px,0);}}';
                sheet = style.sheet;
                sheet.insertRule(rules, 0);                // 给轮播图片添加动态的样式
                rules = '.loop-animate{animation: imagesLoopMove ' + 200 + 'ms linear 0ms infinite;}';
                sheet.insertRule(rules, 1);                this.animateStyle = style;                this.cssRule = sheet.cssRules[1];                this.animateTimeCurve();                console.group('function createKeyFramesStyleSheetRules');                console.log('dist:', dist);                console.log('style:', style);                console.log('sheet:', sheet);                console.log('token:', token);                console.log('cssRule:', this.cssRule);                console.groupEnd('End');
                len   = null;
                dist  = null;
                style = null;
                sheet = null;
                token = null;
                rules = null;
            }

Note, if it reports a DOMExpersion error, then it is a writing error in your cssRules, such as @keyframes Missing names, etc.

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