ES6 new feature development WeChat applet (9)

You do not need to declare the strict mode. you do not need to place & quot; usestrict & quot; in the first line of the script file. when the ES6 conversion function is enabled by the applet development tool, javasctipt strict mode (StrictMode) is enabled by default )... strict Mode does not need to be stated

You do not need to place "use strict" in the first line of the script file. when the ES6 conversion function is enabled by the applet development tool, the Strict Mode is enabled by default ).

Replace IIFES with block-level scope

IIFE (immediate execution of function expressions) is usually used to create an internal scope. in ES6, it can create a block-level scope, not limited to the function scope. The emergence of block-level scopes makes it unnecessary to immediately execute anonymous functions (IIFE) that are widely used.

IIFE:

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