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As shown below:
<!doctype html>
<html>
<head>
<meta charset="utf-8>
<title>Untitled Document</title>
</head>
<script type="text/javascript">
/*
string string;
str specifies the character;
split(), used to split a string into an array of strings;
split(str)[0], read the value at index 0 of the array (the first value), all array indices are default to start from 0;
*/
function getStr(string,str){
var str_before = string.split(str)[0];
var str_after = string.split(str)[1];
alert('Before: '+str_before+' - After: '+str_after);
}
</script>
<body>
<input type="button" onClick="getStr('string','r');" value="Get Value" />
</body>
</html>
That's all the js to get the specified character before brought to you by the editor/This is the complete example of the string after, I hope everyone will support the cheerleading tutorial~