Functions to help with fetching and updating parameters from the URI hash

hash_params.js

/*
|--------------------------------------------------------------------------
| Get parameters from the URI hash
|--------------------------------------------------------------------------
*/
function getParamsFromHash() {
    var rawHash     =   window.location.hash.substr(1);
    var hashParts   =   rawHash.split(';');
    var paramData   =   {};
    hashParts.forEach(function(part) {
        partData = part.split(':');
        paramData[partData[0]] = partData[1];
    });
    return paramData;
}

/*
|--------------------------------------------------------------------------
| Build and set the URI hash from param data
|--------------------------------------------------------------------------
*/
function buildHashFromParams(paramData) {
    hashParts = new Array();
    for(key in paramData) { hashParts.push(key + ':' + paramData[key]); }
    window.location.hash = hashParts.join(';');
}

/*
|--------------------------------------------------------------------------
| Update URI hash param
|--------------------------------------------------------------------------
*/
function updateHashParam(key, value) {
    params = getParamsFromHash();
    params[key] = value;
    buildHashFromParams(params);
    return params;
}

/*
|--------------------------------------------------------------------------
| Remove a URI hash param
|--------------------------------------------------------------------------
*/
function removeHashParam(key) {
    params = getParamsFromHash();
    delete params[key];
    buildHashFromParams(params);
    return params;
}