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refactor objects, add optional chaining

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This commit is contained in:
Ilya Kantor 2020-05-03 16:56:16 +03:00
parent 09a964e969
commit b057341f6c
35 changed files with 579 additions and 435 deletions
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2
1-js/09-classes/07-mixins/article.md
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@ -140,7 +140,7 @@ let eventMixin = {
* menu.off('select', handler)
*/
off(eventName, handler) {
let handlers = this._eventHandlers && this._eventHandlers[eventName];
let handlers = this._eventHandlers?.[eventName];
if (!handlers) return;
for (let i = 0; i < handlers.length; i++) {
if (handlers[i] === handler) {

2
1-js/09-classes/07-mixins/head.html
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@ -18,7 +18,7 @@ let eventMixin = {
* menu.off('select', handler)
*/
off(eventName, handler) {
let handlers = this._eventHandlers && this._eventHandlers[eventName];
let handlers = this._eventHandlers?.[eventName];
if (!handlers) return;
for(let i = 0; i < handlers.length; i++) {
if (handlers[i] == handler) {