diff options
Diffstat (limited to 'third_party/webkit/PerformanceTests/Speedometer/resources/todomvc/vanilla-examples/es2015-babel-webpack/src/memory.js')
-rw-r--r-- | third_party/webkit/PerformanceTests/Speedometer/resources/todomvc/vanilla-examples/es2015-babel-webpack/src/memory.js | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/third_party/webkit/PerformanceTests/Speedometer/resources/todomvc/vanilla-examples/es2015-babel-webpack/src/memory.js b/third_party/webkit/PerformanceTests/Speedometer/resources/todomvc/vanilla-examples/es2015-babel-webpack/src/memory.js new file mode 100644 index 0000000000..c81c0e511f --- /dev/null +++ b/third_party/webkit/PerformanceTests/Speedometer/resources/todomvc/vanilla-examples/es2015-babel-webpack/src/memory.js @@ -0,0 +1,82 @@ +(function(root) { + var localStorageMemory = {}; + var cache = {}; + + /** + * number of stored items. + */ + localStorageMemory.length = 0; + + /** + * returns item for passed key, or null + * + * @para {String} key + * name of item to be returned + * @returns {String|null} + */ + localStorageMemory.getItem = function(key) { + return cache[key] || null; + }; + + /** + * sets item for key to passed value, as String + * + * @para {String} key + * name of item to be set + * @para {String} value + * value, will always be turned into a String + * @returns {undefined} + */ + localStorageMemory.setItem = function(key, value) { + if (typeof value === 'undefined') { + localStorageMemory.removeItem(key); + } else { + if (!(cache.hasOwnProperty(key))) { + localStorageMemory.length++; + } + + cache[key] = '' + value; + } + }; + + /** + * removes item for passed key + * + * @para {String} key + * name of item to be removed + * @returns {undefined} + */ + localStorageMemory.removeItem = function(key) { + if (cache.hasOwnProperty(key)) { + delete cache[key]; + localStorageMemory.length--; + } + }; + + /** + * returns name of key at passed index + * + * @para {Number} index + * Position for key to be returned (starts at 0) + * @returns {String|null} + */ + localStorageMemory.key = function(index) { + return Object.keys(cache)[index] || null; + }; + + /** + * removes all stored items and sets length to 0 + * + * @returns {undefined} + */ + localStorageMemory.clear = function() { + cache = {}; + localStorageMemory.length = 0; + }; + + if (typeof exports === 'object') { + module.exports = localStorageMemory; + } else { + root.localStorageMemory = localStorageMemory; + } +})(this);
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