DeprecationReportBody: lineNumber property
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
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.
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.
js
let options = {
types: ["deprecation"],
buffered: true,
};
let observer = new ReportingObserver((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
Specification |
---|
Deprecation Reporting # dom-deprecationreportbody-linenumber |
Browser compatibility
BCD tables only load in the browser