获取localStorage和sessionStorage当前已存储大小
function get_cache_size(t){ t = t == undefined ? "l" : t; var obj = ""; if(t==='l'){ if(!window.localStorage) { console.log('浏览器不支持localStorage'); }else{ obj = window.localStorage; } }else{ if(!window.sessionStorage) { console.log('浏览器不支持sessionStorage'); }else{ obj = window.sessionStorage; } } if(obj!==""){ var size = 0; for(item in obj) { if(obj.hasOwnProperty(item)) { size += obj.getItem(item).length; } } console.log('当前已用存储:' + (size / 1024).toFixed(2) + 'KB'); } } get_cache_size('l');//localStorage当前大小 get_cache_size('s');//sessionStorage当前大小