javascript - highlight text in a variable using RegExp and span -

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i have div of text. want highlight of text stored in variable using regexp , span. text highlighted unknown @ run time.

var t = $("#highlightoutput").html(); //sentence  	var s = t.search(hstr);//what shd replaced  	var query = new regexp(s, "g");  	console.log(s);  	t = t.replace(query, "<span class='highlight'>"+s+ "</span>"); //problem here  	//how write regex code highlight text stored in s.  	$("#highlightoutput").html(t);

search returns index, want actual text. use match that: method returns array of matches, , can take first one.

var s = t.match(hstr)[0];

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