Coverage class
Coverage gathers information about parts of JavaScript and CSS that were used by the page.
An example of using JavaScript and CSS coverage to get percentage of initially executed code:
// Enable both JavaScript and CSS coverage
await Future.wait([
page.coverage.startJSCoverage(),
page.coverage.startCSSCoverage(),
]);
// Navigate to page
await page.goto('https://example.com');
// Disable both JavaScript and CSS coverage
var jsCoverage = await page.coverage.stopJSCoverage();
var cssCoverage = await page.coverage.stopCSSCoverage();
var totalBytes = 0;
var usedBytes = 0;
var coverage = [...jsCoverage, ...cssCoverage];
for (var entry in coverage) {
totalBytes += entry.text.length;
for (var range in entry.ranges) {
usedBytes += range.end - range.start - 1;
}
}
print('Bytes used: ${usedBytes / totalBytes * 100}%');
Constructors
- Coverage(DevTools devTools)
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
startCSSCoverage(
{}) → Future< void> - Parameters
-
startJSCoverage(
{bool? reportAnonymousScripts}) → Future< void> - Parameters:
-
stopCSSCoverage(
) → Future< List< CoverageEntry> > - Returns a Future that resolves to the array of coverage reports for all stylesheets
-
stopJSCoverage(
) → Future< List< CoverageEntry> > - Returns a Future that resolves to the array of coverage reports for all scripts
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited