JS = = = = = = Difference (two equals and three equals)

JS = = = = = = = Difference [to] 1, for String,number and other basic types, = = and = = = There is a difference between 1) different types of comparison, = = Comparison of "conversion to the same type of value" see "Value" is equal, = = = If the type is different, The result is unequal 2) compared to the same type, direct "value" comparison, the results are the same as 2, for Array,object and other advanced types, = = and = = = no difference in the "pointer address" comparison 3, the basic type and the advanced type, = = and = = = There's a difference. 1) for = =, convert advanced to underlying type, make "value" Comparison 2) because the type is different, = = = The result is False

Original: http://blog.sina.com.cn/s/blog_4b32835b01014iv9.html

JS = = = = = = Difference (two equals and three equals)