Use Replace in JavaScript replace:javascript to implement ReplaceAll

You know, directly using replace ("old", "new") will only replace the first encountered "old", then if you want to replace all? JavaScript itself does not seem to provide a way to replace it, and there is actually. As long as this writing can be replace (/old/g, "new"); "G" Here represents a global concept, a regular expression followed by a G, and then use the Replace method, you can achieve the effect of replaceall.
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