javascript - TypeError: Cannot read property 'indexOf' of undefined - Stack Overflow

Node is giving this error while checking the occurrence of a substring:

TypeError: Cannot read property 'indexOf' of undefined'

var withdraw = project.withdrawal;
                var uemail = user.eamil;
                var ans = withdraw.indexOf(uemail) > -1;

Node is giving this error while checking the occurrence of a substring:

TypeError: Cannot read property 'indexOf' of undefined'

var withdraw = project.withdrawal;
                var uemail = user.eamil;
                var ans = withdraw.indexOf(uemail) > -1;

• javascript
• substring
• indexof

Share Improve this question Follow edited Aug 17, 2020 at 18:36 xKobalt 1,50822 gold badges1414 silver badges2020 bronze badges asked May 1, 2016 at 2:05 Syed Usman TariqSyed Usman Tariq 2111 gold badge11 silver badge33 bronze badges 4

• 1 can you console.log(withdraw) and show result... – uzaif Commented May 1, 2016 at 2:07
• Your withdraw variable is undefined. – Soubhik Mondal Commented May 1, 2016 at 2:08
• That means that project doesn't have a withdrawal property. (Or it does have a withdrawal property, but that property's value is undefined.) – nnnnnn Commented May 1, 2016 at 2:09
• 1 you have a typo user.ueamil – Dave Pile Commented Nov 20, 2016 at 8:21

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1 Answer 1

Sorted by: Reset to default 2

The variable withdraw is most likely undefined. Can you default it to an empty string with:

var withdraw = project.withdrawal || "";

That should avoid the error, but it might be better to check if there's another error causing withdrawal to be undefined.