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                            # 簡介
ECMAScript 5.1 (或僅 ES5) 是ECMAScript(基于JavaScript的規范)標準最新修正。 與HTML5規范進程本質類似，ES5通過對現有JavaScript方法添加語句和原生ECMAScript對象做合并實現標準化。

# 瀏覽器支持
隨著Opera 11.60的發布, 所有5大瀏覽器都支持ES5, 除了一些實現的bugs. 除非另有說明，本文中提到的的一切可以用在以下瀏覽器版本（或更高）：
* Opera 11.60
* Internet Explorer 9
* Firefox 4
* Safari 5.1
* Chrome 13

>  IE9不支持嚴格模式 — IE10 添加

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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