javascript - Regex replacing more than I want -

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i want delete body element 1 class starts demo-xxx xxx can character , without fix length.

so can have in body

<body classs="bye demo-hello water">

i using regex /\b\s?demo-.*\b/g so:

$("body")[0].classname = $("body")[0].classname.replace(/\b\s?demo-.*\b/g, '');

but removing classes after demo-xxx, such water:

<body classs="bye">

you need exclude space usintg ^\s , 1 or more characters use + instead of *

$("body")[0].classname =$("body")[0].classname.replace(/\b\s?demo-[^\s]+\b/g,'');

demo


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