js 函數 雜

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擴充瀏覽器原生對象原型用：

function extend(target,source){    var toString = Object.prototype.toString,    hasOwn = Object.prototype.hasOwnProperty,back = {};    if(toString.call(source) !== ‘[object Object]‘){        return;    }    for(var ind in source){        if(hasOwn.call(source,ind) && typeof source[ind] === ‘function‘){            if (!target[ind]) {                target[ind] = source[ind];            }else{                back[ind] = source[ind];            };        }    }    return back;}extend(Array.prototype,{    });

事件是否支援檢查：

eventSupport(eventName,el){    el = el || document.documentElement;    eventName = ‘on‘+eventName;    var ret = eventName in el;    if(el.setAttribute && !ret){        el.setAttribute(eventName,‘return ;‘);        ret = typeof el[eventName] === ‘function‘;        el.removeAttribute(eventName);    }    el = null;    return ret;}

搞定css私人首碼：

var prefixes = [‘‘,‘-webkit-‘,‘-o-‘,‘-moz-‘,‘-ms-‘];var cssMap = {    ‘float‘:support(‘cssFloat‘)? ‘cssFloat‘:‘styleFloat‘,    ‘background‘:‘backgroundColor‘}function camelize(target){    if(target.indexOf(‘-‘) < 0 && target.indexOf(‘_‘) < 0){        return target;    }    return target.replace(/[-_][^-_]/g,function(match){        return match.charAt(1).toUpperCase();    });}function cssName(name,host,camelCase){    if(cssMap[name]){        return cssMap[name];    }    host = host || document.documentElement;    for(var i = 0, n = prefixes.length; i < n; i++){        camelCase = camelize(prefixes[i]+name);        if(camelCase in host){            return (cssMap[name] = camelCase);        }    }    return null;}