javascript check if blank set zero


To check if a value is blank in JavaScript, you can use the if statement and the length property of a string. Here’s an example:

if (!value || value.length === 0) {
  value = 0;

This will check if value is null, undefined, or an empty string, and if it is, it will set value to 0.

Alternatively, you can use the || operator to set a default value for value if it is blank:

value = value || 0;

This will set value to 0 if it is null, undefined, or an empty string.