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Javacript: Set or Update a URL/QueryString Parameter, and update URL using HTML history.replaceState()
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| // Explicitly save/update a url parameter using HTML5's replaceState(). | |
| function updateQueryStringParam(param, value) { | |
| baseUrl = [location.protocol, '//', location.host, location.pathname].join(''); | |
| urlQueryString = document.location.search; | |
| var newParam = key + '=' + value, | |
| params = '?' + newParam; | |
| // If the "search" string exists, then build params from it | |
| if (urlQueryString) { | |
| keyRegex = new RegExp('([\?&])' + key + '[^&]*'); | |
| // If param exists already, update it | |
| if (urlQueryString.match(keyRegex) !== null) { | |
| params = urlQueryString.replace(keyRegex, "$1" + newParam); | |
| } else { // Otherwise, add it to end of query string | |
| params = urlQueryString + '&' + newParam; | |
| } | |
| } | |
| window.history.replaceState({}, "", baseUrl + params); | |
| } |
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