Created
January 19, 2021 06:42
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计算 localStorage 所占空间
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| // 第一种计算方法 | |
| var _lsTotal = 0, // 总长度 | |
| _xLen, // 每一项的长度 | |
| _x; // 每一项的名称 | |
| var _ls = [] // 用来存储每一项 localStorage | |
| for (_x in localStorage) { | |
| if (!localStorage.hasOwnProperty(_x)) { | |
| continue; | |
| } | |
| _xLen = ((localStorage[_x].length + _x.length) * 2); // 每一项的长度包括 名字的长度+内容的长度，这里都按照一个字符占2个字节（2B）来简化计算 | |
| _lsTotal += _xLen; | |
| _ls.push({ | |
| name: _x, | |
| length: (_xLen / 1024).toFixed(4) | |
| }) | |
| } | |
| console.log('Total = ' + (_lsTotal / 1024).toFixed(4) + ' KB'); | |
| _ls = _ls.sort((a, b) => b.length - a.length) // 按照长度 从大到小 排序 | |
| _ls.forEach(item => console.log(item.name + ' : ' + (item.length / 1024).toFixed(4) + ' KB')) | |
| // 第二种计算方法 | |
| var localStorageSpace = function () { | |
| var allStrings = ''; | |
| for (var key in window.localStorage) { | |
| if (window.localStorage.hasOwnProperty(key)) { | |
| allStrings += window.localStorage[key]; | |
| } | |
| } | |
| return allStrings ? 3 + ((allStrings.length * 16) / (8 * 1024)) + ' KB' : 'Empty (0 KB)'; | |
| }; |
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