在IE浏览器环境,数组里面的最后一个元素的分隔逗号一定要删除,不然会自动增加一个undefined的数组元素;
月份:2016年7月
ie8 及以下不支持 array.map 的解决方式
今天做项目的时候,无意乱用map方法,chrome和firefox支持,但是IE8不支持,网上找了一下有木有解,发现国外有大神写了array.prototype的map扩展
JS源码:
success:function(res){ $('#busicode').find('.select-loading').text('请选择'); res.data.map(function(element){ $('#busicode').append('<option value="'+element.busicode+'">'+element.businame+'</option>'); }); }
array.prototype.map方法:
// Production steps of ECMA-262, Edition 5, 15.4.4.19 // Reference: http://es5.github.com/#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 (thisArg) { T = thisArg; } // 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, : true, Enumerable: true, Configurable: true}, // and false. // In browsers that support Object.defineProperty, use the following: // Object.defineProperty(A, Pk, { 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; }; }
参考来源:GO >>
Firefox火狐浏览器web开发调试开启强制刷新缓存模式
最近做项目的时候,在火狐浏览器发现缓存难清理,用Ctrl+F5 Ctrl+R 等在谷歌和IE浏览器的快捷键没用,搜索了一下,发现火狐清理缓存比较麻烦,默认快捷键 Ctrl + Shift + Del 键是弹窗选择性清理,还要点击按钮选择,在web开发调试中非常的不方便,也不科学。
然后问度娘后发现火狐是要进入它的参数设置里设置本地不缓存的:
火狐浏览器地址栏输入:about:config
1.找到browser.cache.check_doc_frequency选项,双击将3改成1
2.找到browser.cache.disk.enable 把true改为 false
3.找到browser.cache.memory.enable 把true改为 false