Lighthouse v6: cumulativeLayoutShift is rounded to 0 in metrics section

[alekseykulikov]

Provide the steps to reproduce

Run LH 6.0.0.beta on any URL

lighthouse https://www.apple.com/

What is the current behavior?

audits.metrics.details[0].cumulativeLayoutShift is 0

But audits.cumulative-layout-shift.numericValue is 0.19574185519748266.

What is the expected behavior?

I expect the value rounded to 3 decimals, like in the HTML Report: 0.196, because a good CLS value is 0.1 and it's a first float value in metrics.

The problem is related to this line of code: https://github.com/GoogleChrome/lighthouse/blob/master/lighthouse-core/audits/metrics.js#L41

Environment Information

• Affected Channels: All
• Lighthouse version: v6.0.0.beta
• Chrome version: v83.0.4090.0
• Node.js version: v12
• Operating System: Mac

[paulirish]

Great catch. I'll take care of this.

[paulirish]

@patrickhulce could you take this? should be quick

[patrickhulce]

sure thing 👍