ECMA-262 is a direct-to-browser protocol for JavaScript. Comments can increase the readability of our code and facilitate our own work in future work.
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ECMAScript includes two different types of values: primitive data types and reference data types.
Basic data types refer to simple data segments, and reference data types refer to objects that consist of multiple values.
When we assign a variable to a variable, the first thing the parser needs to confirm is whether the value is a primitive type or a reference type.
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