Set a breakpoint based on a certain condition
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![Set a breakpoint based on a certain condition.](https://wd.imgix.net/image/T4FyVKpzu4WKF1kBNvXepbi08t52/Ui64pnpXXZMiTayTIC9b.gif?auto=format)
When you set a breakpoint, you can make it conditional based on the result of an expression. Right click on the line gutter and select Add Conditional Breakpoint and enter your expression.
If you have a callback like:
function callback(result, err) {
//set a conditional breakpoint based on the existence of err
}
You could set a conditional breakpoint based on the existence of err
.
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