Eliminate es6-collections.js

[sivaschenko]

Depends on MutationObserver.js elimination: #33207

Remove lib/web/es6-collections.js and replace usages with native JS.

The es6-collections are providing the following polyfills:

• WeakMap - ✔ supported https://caniuse.com/mdn-javascript_builtins_weakmap
  

  magento2/lib/web/es6-collections.js

  Lines 8 to 22 in 7c6b636

  	//Polyfill global objects
  	if (typeof WeakMap == 'undefined') {
  	exports.WeakMap = createCollection({
  	// WeakMap#delete(key:void*):boolean
  	'delete': sharedDelete,
  	// WeakMap#clear():
  	clear: sharedClear,
  	// WeakMap#get(key:void*):void*
  	get: sharedGet,
  	// WeakMap#has(key:void*):boolean
  	has: mapHas,
  	// WeakMap#set(key:void*, value:void*):void
  	set: sharedSet
  	}, true);
  	}

• Map - ✔ supported https://caniuse.com/mdn-javascript_builtins_map
  

  magento2/lib/web/es6-collections.js

  Lines 24 to 46 in 7c6b636

  	if (typeof Map == 'undefined' || typeof ((new Map).values) !== 'function' || !(new Map).values().next) {
  	exports.Map = createCollection({
  	// WeakMap#delete(key:void*):boolean
  	'delete': sharedDelete,
  	//:was Map#get(key:void*[, d3fault:void*]):void*
  	// Map#has(key:void*):boolean
  	has: mapHas,
  	// Map#get(key:void*):boolean
  	get: sharedGet,
  	// Map#set(key:void*, value:void*):void
  	set: sharedSet,
  	// Map#keys(void):Iterator
  	keys: sharedKeys,
  	// Map#values(void):Iterator
  	values: sharedValues,
  	// Map#entries(void):Iterator
  	entries: mapEntries,
  	// Map#forEach(callback:Function, context:void*):void ==> callback.call(context, key, value, mapObject) === not in specs`
  	forEach: sharedForEach,
  	// Map#clear():
  	clear: sharedClear
  	});
  	}

• Set - ✔ supported https://caniuse.com/mdn-javascript_builtins_set
  

  magento2/lib/web/es6-collections.js

  Lines 48 to 67 in 7c6b636

  	if (typeof Set == 'undefined' || typeof ((new Set).values) !== 'function' || !(new Set).values().next) {
  	exports.Set = createCollection({
  	// Set#has(value:void*):boolean
  	has: setHas,
  	// Set#add(value:void*):boolean
  	add: sharedAdd,
  	// Set#delete(key:void*):boolean
  	'delete': sharedDelete,
  	// Set#clear():
  	clear: sharedClear,
  	// Set#keys(void):Iterator
  	keys: sharedValues, // specs actually say "the same function object as the initial value of the values property"
  	// Set#values(void):Iterator
  	values: sharedValues,
  	// Set#entries(void):Iterator
  	entries: setEntries,
  	// Set#forEach(callback:Function, context:void*):void ==> callback.call(context, value, index) === not in specs
  	forEach: sharedForEach
  	});
  	}

• WeakSet - ✔ supported https://caniuse.com/mdn-javascript_builtins_weakset
  

  magento2/lib/web/es6-collections.js

  Lines 69 to 80 in 7c6b636

  	if (typeof WeakSet == 'undefined') {
  	exports.WeakSet = createCollection({
  	// WeakSet#delete(key:void*):boolean
  	'delete': sharedDelete,
  	// WeakSet#add(value:void*):boolean
  	add: sharedAdd,
  	// WeakSet#clear():
  	clear: sharedClear,
  	// WeakSet#has(value:void*):boolean
  	has: setHas
  	}, true);
  	}

Following the investigation in: #32851

[m2-assistant]

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[anzin]

@magento I am working on this

[sivaschenko]

@magento export issue to Jira project AC as Story

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.magento.com/browse/AC-304 is successfully created for this GitHub issue.