Differences between "= =" and "= = =" Operators in JavaScript

Same point:

Two operators can be used to compare two values for equality, allow manipulation of any type of operand, or return true if the operands are equal, otherwise false.

Different points:

the "= = =" operator, also known as the strict equality operator, is used to detect whether two operands are strictly equal. The operator first calculates the value of its operand, then compares the two values, and does not first convert any type of operator into the comparison process.

the "= =" operator, called the equality operator, is used to detect whether two operands are equal, where the definition of "equality" is very loose and allows for type conversions. The equality operator "= =" and the "= = =" operator are similar, but the comparison of equality operators is not strict. If the two operands are not of the same type, the equality operator attempts to perform some type conversions on the operands and then compares them. For example:

1. If one value is null and the other is undefined, they are equal.

2. If one value is a number and the other is a string, the comparison now converts the string to a number and then compares it with the converted value.

3. If one of the values is true, convert it to 1 and then compare.

Use case:

Because the "= =" will occur during the use of the type conversion, so in order to avoid the use of "= =" in the process of unexpected type conversion and affect the results of the comparison, it is recommended that except for special cases, all use "= = =".

Note: This article for their own learning to use the JS process of learning notes, the article describes if there are improper, welcome to master shot Bricks.

Differences between "= =" and "= = =" Operators in JavaScript