我发现以下代码很奇怪:
var allextRules = Ext.util.CSS.getRules();
Object.keys(allextRules).forEach(function(key) {
var keyname = key;
if(keyname.indexOf("js") != -1){
Ext.util.CSS.removeStyleSheet(keyname);
console.log(keyname + " Removed");
}
});
当在其他浏览器(例如Google Chrome)中测试上述工作时,没有错误。但是,在IE 9中测试时,会出现如下错误:
SCRIPT438: Object doesn't support property or method 'keys'
根据这篇文章(https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/keys),IE支持Object.keys
。
我错过了什么吗?
答案 0 :(得分:10)
尝试在
之前添加此代码 if (!Object.keys) {
Object.keys = (function () {
var hasOwnProperty = Object.prototype.hasOwnProperty,
hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
dontEnums = [
'toString',
'toLocaleString',
'valueOf',
'hasOwnProperty',
'isPrototypeOf',
'propertyIsEnumerable',
'constructor'
],
dontEnumsLength = dontEnums.length;
return function (obj) {
if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) throw new TypeError('Object.keys called on non-object');
var result = [];
for (var prop in obj) {
if (hasOwnProperty.call(obj, prop)) result.push(prop);
}
if (hasDontEnumBug) {
for (var i=0; i < dontEnumsLength; i++) {
if (hasOwnProperty.call(obj, dontEnums[i])) result.push(dontEnums[i]);
}
}
return result;
}
})()
};
此处有关于此问题的更多详细信息 - https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Object/keys
答案 1 :(得分:3)
(错误script438:对象不支持此属性或方法'foreach',在IE 9中), 解决方案是:
if (!Array.prototype.forEach) {
Array.prototype.forEach = function(fun /*, thisp*/)
{
var len = this.length;
if (typeof fun != "function")
throw new TypeError();
var thisp = arguments[1];
for (var i = 0; i < len; i++)
{
if (i in this)
fun.call(thisp, this[i], i, this);
}
};
}
字体:http://www.tutorialspoint.com/javascript/array_foreach.htm