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95 lines
3.4 KiB
JavaScript
95 lines
3.4 KiB
JavaScript
/*!!
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* Hasher <http://github.com/millermedeiros/hasher>
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* @author Miller Medeiros
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* @version 1.1.2 (2012/10/31 03:19 PM)
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* Released under the MIT License
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*/
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(global => {
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//--------------------------------------------------------------------------------------
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// Private
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//--------------------------------------------------------------------------------------
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const
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_hashValRegexp = /#(.*)$/,
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_hashRegexp = /^[#/]+/,
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_hashTrim = /^\/+/g,
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_trimHash = hash => hash?.replace(_hashTrim, '') || '',
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_getWindowHash = () => {
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//parsed full URL instead of getting window.location.hash because Firefox decode hash value (and all the other browsers don't)
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var result = _hashValRegexp.exec( location.href );
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return result?.[1] ? decodeURIComponent(result[1]) : '';
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},
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_registerChange = newHash => {
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if (_hash !== newHash) {
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var oldHash = _hash;
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_hash = newHash; //should come before event dispatch to make sure user can get proper value inside event handler
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_dispatch(_trimHash(newHash), _trimHash(oldHash));
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}
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},
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_setHash = (path, replace) => {
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path = path ? '/' + path.replace(_hashRegexp, '') : path;
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if (path !== _hash){
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// we should store raw value
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_registerChange(path);
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if (path === _hash) {
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path = '#' + encodeURI(path)
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// we check if path is still === _hash to avoid error in
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// case of multiple consecutive redirects [issue #39]
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replace
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? location.replace(path)
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: (location.hash = path);
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}
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}
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},
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_dispatch = (...args) => hasher.active && _bindings.forEach(callback => callback(...args)),
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//--------------------------------------------------------------------------------------
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// Public (API)
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//--------------------------------------------------------------------------------------
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hasher = /** @lends hasher */ {
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clear : () => {
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_bindings = [];
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hasher.active = true;
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},
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/**
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* Signal dispatched when hash value changes.
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* - pass current hash as 1st parameter to listeners and previous hash value as 2nd parameter.
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* @type signals.Signal
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*/
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active : true,
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add : callback => _bindings.push(callback),
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/**
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* Start listening/dispatching changes in the hash/history.
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* <ul>
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* <li>hasher won't dispatch CHANGE events by manually typing a new value or pressing the back/forward buttons before calling this method.</li>
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* </ul>
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*/
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init : () => _dispatch(_trimHash(_hash)),
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/**
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* Set Hash value, generating a new history record.
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* @param {...string} path Hash value without '#'.
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* @example hasher.setHash('lorem/ipsum/dolor') -> '#/lorem/ipsum/dolor'
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*/
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setHash : path => _setHash(path),
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/**
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* Set Hash value without keeping previous hash on the history record.
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* @param {...string} path Hash value without '#'.
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* @example hasher.replaceHash('lorem/ipsum/dolor') -> '#/lorem/ipsum/dolor'
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*/
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replaceHash : path => _setHash(path, true)
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};
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var _hash = _getWindowHash(),
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_bindings = [];
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addEventListener('hashchange', () => _registerChange(_getWindowHash()));
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global.hasher = hasher;
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})(this);
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