js if and condition
The && operator "short-circuits" - that is, if the left condition is false, it doesn't bother evaluating the right one. Similarly, the || operator ..., To use the AND statement, it should be && . So for your if statement it should be if ($(".select-box option[value='3']").attr('selected') ...
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 js if and condition 相關參考資料
Add conditions - Learn to code with JavaScript ...
Up until now, all the code in our programs has been executed chronologically. Let's enrich our code by adding conditional execution! https://openclassrooms.com Does a javascript if statement with multiple conditions test all ...
The && operator "short-circuits" - that is, if the left condition is false, it doesn't bother evaluating the right one. Similarly, the || operator ... https://stackoverflow.com How can use AND statement in if with javascript? - Stack Overflow
To use the AND statement, it should be && . So for your if statement it should be if ($(".select-box option[value='3']").attr('selected') ... https://stackoverflow.com How to specify multiple conditions in an if statement in ...
just add them within the main bracket of the if statement like if ((Type == 2 && PageCount == 0) || (Type == 2 && PageCount ... https://stackoverflow.com How to use OR condition in a JavaScript IF statement? - Stack Overflow
Simply use the logical "OR" operator, that is || . if (A || B). https://stackoverflow.com if...else - JavaScript | MDN
statement2: Statement that is executed if condition is falsy and the else clause exists. Can be any statement, including block statements and ... https://developer.mozilla.org JavaScript Comparison and Logical Operators - W3Schools
variablename = (condition) ? value1:value2 ... If the variable age is a value below 18, the value of the variable voteable will be "Too young", otherwise the value ... https://www.w3schools.com javascript if condition && condition doesn't work - Stack Overflow
It sounds like || is what you are looking for here. The && operator is only true if both the left and right side of the && are true. In this case you ... https://stackoverflow.com JavaScript if else else if - W3Schools
In JavaScript we have the following conditional statements: Use if to specify a block of code to be executed, if a specified condition is true; Use else to specify a ... https://www.w3schools.com JavaScript ifelse Statement - W3Schools
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