localStorage

try{
	localStorage.setItem(key,value);
}catch(oException){
	if(oException.name == 'QuotaExceededError'){
		console.log('超出本地存储限额!');
		//如果历史信息不重要了,可清空后再设置
		localStorage.clear();
		localStorage.setItem(key,value);
	}
}
 localStorageService.get(key);
localStorageService.clearAll();
localStorageService.clearAll(/^\d+$/);
 localStorageService.remove(key1, key2, key3);

https://lzw.me/a/html5-localstorage.html
var re = /ab+c/;

正则表达式字面量在脚本加载后编译。若你的正则表达式是常量,使用这种方式可以获得更好的性能。

调用RegExp对象的构造函数,如下所示:

var re = new RegExp("ab+c");

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