DeprecationReportBody.lineNumber

The lineNumber read-only property of the DeprecationReportBody interface returns the line in the source file in which the deprecated feature was used.

Note:

This property is most useful alongside DeprecationReportBody.sourceFile as it enables the location of the line in that file where the error occurred.

Syntax

let lineNumber = DeprecationReportBody.lineNumber;

Value

An integer, or null if the line is not known.

Examples

In this example we create a new ReportingObserver to observe deprecation reports, then print the value of lineNumber to the console.

let options = {
  types: ['deprecation'],
  buffered: true
}

let observer = new ReportingObserver(function(reports, observer) {
  let firstReport = reports[0];
  console.log(firstReport.type); // deprecation
  console.log(firstReport.body.sourceFile); // the source file
  console.log(firstReport.body.lineNumber); // the line in that file
}, options);

Specifications

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Browser compatibility

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