Number() VS parseInt()

both Number() and parseInt() Usually used to convert strings to numbers .

differences

1. Number() Conversion type , and parseInt Parse the entered value .

// Parsing
parseInt('32px'); // 32
parseInt('5e1'); // 5

// Convert type
Number('32px'); // NaN
Number('5e1'); // 50

1. As you can see , parseInt Will resolve to the first non numeric character . On the other hand , Number Will try to convert the entire string .
2. parseInt Take two parameters . The second parameter is used to represent the cardinality .

parseInt('0101'); // 101
parseInt('0101', 10); // 101
parseInt('0101', 2); // 5

Number('0101'); // 101

When we pass special values , They will return different results , for example undefinedor null：