creat call-apply-bind-methods readme files (#2172)

content/roadmaps/106-javascript/content/111-javascript-this-keyword/107-call-method.md

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+# call() method
+
+The `call()` method calls the function with a reference to the aspire object to `this` keyword. `call()` method accepts an argument list and each arguments should be provided individually.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/call'>call() method</BadgeLink>

content/roadmaps/106-javascript/content/111-javascript-this-keyword/108-apply-method.md

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+# apply() method
+
+`apply()` method is almost identical to `call()` method, except that `call()` method accepts an argument list, while `apply()` method accepts a single array of arguments.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/apply'>apply() method</BadgeLink>

content/roadmaps/106-javascript/content/111-javascript-this-keyword/109-bind-method.md

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+# bind() method
+
+The `bind()` method return a new method that has its `this` keyword refers to the aspire object, with a given sequence of arguments which can be call later.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind'>bind() method</BadgeLink>