DeprecationReportBody: lineNumber property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Note: This feature is available in Web Workers.
Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
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.
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 |