The difference between JavaScript = and =: javascript

The difference between JavaScript = and =: javascript
Differences between JavaScript = and =

==And === both determine whether the variables on both sides are equal, but there are also differences

I. =

===Indicates a constant. First, compare whether the data types of variables on both sides are equal, and then compare whether the values of variables on both sides are equal;

• Var param1 = '1', param2 = '1 ';
  Param1 = param2; // The type and value are both equal to true
  Var param3 = 1;
  Param1 = param3; // The type is not equal to the value. false
  Var param4 = 2;
  Param1 = param4; // The type and value are not equal. false

• Var param1 = null, param2 = undefined;
  Param1 = param2; // false

2. =

= Equal means that only the values of the variables on both sides are equal

• Var param1 = '1', param2 = '1 ';
  Param1 = param2; // The type and value are both equal to true
  Var param3 = 1;
  Param1 = param3; // The type is not equal and the value is true.
  Var param4 = 2;
  Param1 = param4; // The type and value are not equal. false

• Var param1 = null, param2 = undefined;
  Param1 = param2; // true