==
and !=
JS-0050112 if (level.id != this.selectedLevel) return "";
113 if (level.id == this.selectedLevel && level.mode == buttonMode) {
114 if (buttonMode == 0) return "blue white--text";
115 if (buttonMode == 1) return "red white--text";116 else return "green white--text";
117 }
118 return "";
111 getButtonColor(level, buttonMode) {
112 if (level.id != this.selectedLevel) return "";
113 if (level.id == this.selectedLevel && level.mode == buttonMode) {
114 if (buttonMode == 0) return "blue white--text";115 if (buttonMode == 1) return "red white--text";
116 else return "green white--text";
117 }
110
111 getButtonColor(level, buttonMode) {
112 if (level.id != this.selectedLevel) return "";
113 if (level.id == this.selectedLevel && level.mode == buttonMode) {114 if (buttonMode == 0) return "blue white--text";
115 if (buttonMode == 1) return "red white--text";
116 else return "green white--text";
110
111 getButtonColor(level, buttonMode) {
112 if (level.id != this.selectedLevel) return "";
113 if (level.id == this.selectedLevel && level.mode == buttonMode) {114 if (buttonMode == 0) return "blue white--text";
115 if (buttonMode == 1) return "red white--text";
116 else return "green white--text";
109 },
110
111 getButtonColor(level, buttonMode) {
112 if (level.id != this.selectedLevel) return "";113 if (level.id == this.selectedLevel && level.mode == buttonMode) {
114 if (buttonMode == 0) return "blue white--text";
115 if (buttonMode == 1) return "red white--text";
It is considered good practice to use the type-safe equality operators ===
and !==
instead of their regular counterparts ==
and !=
.
The strict equality operators (===
and !==
) use the strict equality comparison algorithm to compare two operands.
false
.true
only if they refer to the same object.null
or both operands are undefined
, return true
.NaN
, return false
.+0
and -0
are considered to be the same value.true
or both false
.The most notable difference between this operator and the equality (==
) operator is that if the operands are of different types, the ==
operator attempts to convert them to the same type before comparing.
a == b
foo == true
bananas != 1
value == undefined
typeof foo == 'undefined'
'hello' != 'world'
0 == 0
true == true
foo == null
a === b
foo === true
bananas !== 1
value === undefined
typeof foo === 'undefined'
'hello' !== 'world'
0 === 0
true === true
foo === null