对象不支持属性或方法"映射" - IE11

Question

我在 Vue 中使用 Typeahead 控件搜索密码，该控件在现代浏览器中没有问题也没有错误，但在 IE11 中测试时，我收到错误："对象不支持属性或方法'map'"。

Answer 1

在使用 map 方法之前尝试添加以下 javascript 脚本(将脚本添加到索引.html页面的头部(：

// Production steps of ECMA-262, Edition 5, 15.4.4.19
// Reference: http://es5.github.io/#x15.4.4.19
if (!Array.prototype.map) {
Array.prototype.map = function(callback/*, thisArg*/) {
var T, A, k;
if (this == null) {
throw new TypeError('this is null or not defined');
}
// 1. Let O be the result of calling ToObject passing the |this|
//    value as the argument.
var O = Object(this);
// 2. Let lenValue be the result of calling the Get internal
//    method of O with the argument "length".
// 3. Let len be ToUint32(lenValue).
var len = O.length >>> 0;
// 4. If IsCallable(callback) is false, throw a TypeError exception.
// See: http://es5.github.com/#x9.11
if (typeof callback !== 'function') {
throw new TypeError(callback + ' is not a function');
}
// 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
if (arguments.length > 1) {
T = arguments[1];
}
// 6. Let A be a new array created as if by the expression new Array(len)
//    where Array is the standard built-in constructor with that name and
//    len is the value of len.
A = new Array(len);
// 7. Let k be 0
k = 0;
// 8. Repeat, while k < len
while (k < len) {
var kValue, mappedValue;
// a. Let Pk be ToString(k).
//   This is implicit for LHS operands of the in operator
// b. Let kPresent be the result of calling the HasProperty internal
//    method of O with argument Pk.
//   This step can be combined with c
// c. If kPresent is true, then
if (k in O) {
// i. Let kValue be the result of calling the Get internal
//    method of O with argument Pk.
kValue = O[k];
// ii. Let mappedValue be the result of calling the Call internal
//     method of callback with T as the this value and argument
//     list containing kValue, k, and O.
mappedValue = callback.call(T, kValue, k, O);
// iii. Call the DefineOwnProperty internal method of A with arguments
// Pk, Property Descriptor
// { Value: mappedValue,
//   Writable: true,
//   Enumerable: true,
//   Configurable: true },
// and false.
// In browsers that support Object.defineProperty, use the following:
// Object.defineProperty(A, k, {
//   value: mappedValue,
//   writable: true,
//   enumerable: true,
//   configurable: true
// });
// For best browser support, use the following:
A[k] = mappedValue;
}
// d. Increase k by 1.
k++;
}
// 9. return A
return A;
};
}

更详细的信息，请参考 Array.prototype.map(( 方法。

此外，您还可以尝试在索引.html页面的头部添加以下脚本。

<script src='https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/6.23.0/polyfill.min.js'></script>

如果仍然不起作用，您能否发布足够的代码以在示例中重现问题，我们可能更容易缩小问题范围。