correct way of comparing string jquery operator =

Question

Is this the correct way? I want the statement to run if the value of somevar equals the string?

if (somevar = '836e3ef9-53d4-414b-a401-6eef16ac01d6'){
 $("#code").text(data.DATA[0].ID);
}

No. That assigns the value. Use === – mbx-mbx Sep 21 '12 at 09:07 — mbx-mbx, Sep 21 '12 at 09:07

score 51 · Accepted Answer · edited May 23 '17 at 12:25

51

No. = sets somevar to have that value. use === to compare value and type which returns a boolean that you need.

Never use or suggest == instead of ===. its a recipe for disaster. e.g 0 == "" is true but "" == '0' is false and many more.

More information also in this great answer

edited May 23 '17 at 12:25

Community

answered Sep 21 '12 at 09:07

makeitmorehuman

1

Similarly, you may use `!==` instead of `!=` for checking opposite conditions. – Chaitanya Jun 29 '17 at 21:30

sdespont · Answer 2 · 2012-09-21T09:14:38.040

10

NO, when you are using only one "=" you are assigning the variable.

~~You must use "==" :~~ You must use "===" :

if (somevar === '836e3ef9-53d4-414b-a401-6eef16ac01d6'){
 $("#code").text(data.DATA[0].ID);
}

You could use fonction like .toLowerCase() to avoid case problem if you want

edited Sep 21 '12 at 09:14

answered Sep 21 '12 at 09:07

sdespont

2

== is bad practice in Javascript and should be avoided – makeitmorehuman Sep 21 '12 at 09:10

score 1 · Answer 3 · answered Sep 21 '12 at 09:09

1

First of all you should use double "==" instead of "=" to compare two values. Using "=" You assigning value to variable in this case "somevar"

answered Sep 21 '12 at 09:09

bognix

4

== is bad practice in Javascript and should be avoided – makeitmorehuman Sep 21 '12 at 09:12

3 Answers3