Empty string, undefined, null, ... To check for a truthy value: if (strValue) { // strValue was non-empty string, true, 42, Infinity, [], ... }. ... <看更多>

The preferred way of checking whether a string s is empty is to check if its length is equal to zero. Thus, the condition is s.length() == 0 . The length method ... ... <看更多>

Checking for an Empty, Null, or Undefined String. KIRUPA. KIRUPA. 18.8K subscribers ... 1K views 1 year ago JavaScript 101. Show less. ... <看更多>

In fact, Javascript will check if the var value is not undefined, not null and not an empty string. EDIT. If we had to compare Aura to LWC ... ... <看更多>