如何找到localStorage的大小

在Javascript控制台（单行版本）中执行以下代码段：

var _lsTotal=0,_xLen,_x;for(_x in localStorage){ if(!localStorage.hasOwnProperty(_x)){continue;} _xLen= ((localStorage[_x].length + _x.length)* 2);_lsTotal+=_xLen; console.log(_x.substr(0,50)+" = "+ (_xLen/1024).toFixed(2)+" KB")};console.log("Total = " + (_lsTotal / 1024).toFixed(2) + " KB");

多行阅读同一条代码

var _lsTotal = 0,    _xLen, _x;for (_x in localStorage) {    if (!localStorage.hasOwnProperty(_x)) {        continue;    }    _xLen = ((localStorage[_x].length + _x.length) * 2);    _lsTotal += _xLen;    console.log(_x.substr(0, 50) + " = " + (_xLen / 1024).toFixed(2) + " KB")};console.log("Total = " + (_lsTotal / 1024).toFixed(2) + " KB");

或将此文本添加到书签的“位置”字段中以方便使用

javascript: var x, xLen, log=[],total=0;for (x in localStorage){if(!localStorage.hasOwnProperty(x)){continue;} xLen =  ((localStorage[x].length * 2 + x.length * 2)/1024); log.push(x.substr(0,30) + " = " +  xLen.toFixed(2) + " KB"); total+= xLen}; if (total > 1024){log.unshift("Total = " + (total/1024).toFixed(2)+ " MB");}else{log.unshift("Total = " + total.toFixed(2)+ " KB");}; alert(log.join("n"));

PS片段根据注释中的要求进行更新。现在，计算包括密钥本身的长度。每个长度都乘以2，因为javascript中的char存储为UTF-16（占用2个字节）

PPS应该可以在Chrome和Firefox中使用。