Home > Developer > Web Develop
= = Comparison (value comparison)
Null |
‘‘ |
0 |
' 0 ' |
Undefined |
NaN |
False |
[] |
{} |
|
| Null | t |
F |
F |
F |
t |
F |
F |
F |
F |
| " | F |
t |
t |
F |
F |
t |
t |
F |
|
| 0 |
F |
t |
Span style= "COLOR: #ff0000" >t |
t |
F |
F |
t | t |
F |
| ' 0 ' | F |
F |
t |
t | F |
F |
t |
F |
F |
Undefined |
T |
F |
F |
F |
T |
F |
F |
F |
F |
NaN |
F |
F |
F |
F |
F |
F |
F |
F |
F |
| false | F |
t |
t |
t |
F |
F |
t | t |
F |
| [] |
F |
t |
t |
F |
F |
t |
F |
F |
|
{} |
F |
F |
F |
F |
F |
F |
F |
F |
F |
! Non-judgmental
Null |
‘‘ |
0 |
' 0 ' |
Undefined |
NaN |
False |
[] |
{} |
T |
T |
T |
F |
T |
T |
T |
F |
F |
If judgment
| null |
" |
0 | ' 0 ' |
undefined |
NaN |
false |
[] |
{} |
| f | F |
F |
t | F |
F |
F |
t |
t |
= = = Comparison (value comparison && type comparison)
Null |
‘‘ |
0 |
' 0 ' |
Undefined |
NaN |
False |
[] |
{} |
|
| Null | t |
  |
  |
  |
  |   |   |
||
| " |
|
t |
  | ", |
  |
  |   | , |
|
| 0 |
|
  |
t |
  |
|
  |   |   |
|
| ' 0 ' |
|
  |
  |
Span style= "COLOR: #ff0000" >t |
|
  |   |   |
|
| undefined |
|
  |
  |
Span style= "COLOR: #ff0000" >  |
t |
  |   |   |
|
| NaN |
|
  |
  |
Span style= "COLOR: #ff0000" >  |
|
f |   |   |
|
| false |
|
  |
  |
Span style= "COLOR: #ff0000" >  |
|
  | t |
  |
|
| [] |
|
  |
  |
  |
  |   | f |
  |
|
{} |
F |
typeof
Null |
‘‘ |
0 |
' 0 ' |
Undefined |
NaN |
False |
[] |
{} |
Object |
String |
Number |
String |
Undefined |
Number |
Boolean |
Object |
Object |
JS Truth table
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
