JavaScript substring() 方法 | javascript get string substring
÷substring()ȡַнָ±ַ֮stringObject.substring(start,stop) start 衣һǸ涨ҪȡӴĵһַstringObjectеλá stop ѡһǸҪȡӴһַstringObjectеλö1 ʡԸòôصӴһֱַĽβ ֵһµֵַַstringObjectһַǴstartstop-1ַ䳤Ϊstopstart˵substring()صӴstartַstopַstartstopȣô÷صľһմΪ0ַstartstopô÷ȡӴ֮ǰȽʵ1ڱУǽʹsubstring()ַȡһЩַ
substring() ȡַнָ±ַ֮
stringObject.substring(start,stop) start 衣һǸ涨ҪȡӴĵһַ stringObject еλá stopѡһǸҪȡӴһַ stringObject еλö 1
ʡԸòôصӴһֱַĽβ
ֵһµֵַַ stringObject һַǴ start stop-1 ַ䳤Ϊ stop start
˵substring() صӴ start ַ stop ַ
start stop ȣô÷صľһմΪ 0 ַ start stop ô÷ȡӴ֮ǰȽ
ʵ 1ڱУǽʹ substring() ַȡһЩַ
<script type="text/javascript"> var str="Hello world!" document.write(str.substring(3)) </script> lo world!һ[1]
2ڱУǽʹ substring() ַȡһЩַ
<script type="text/javascript"> var str="Hello world!" document.write(str.substring(3,7)) </script> lo wһ[2]
References һ (www.w3school.com.cn) һ (www.w3school.com.cn)取得本站獨家住宿推薦 15%OFF 訂房優惠
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