## async method: Response.finished
* since: v1.8
* langs: js
- returns: <[null]|[Error]>

## method: Request.failure
* since: v1.8
* langs: js
- returns: <[null]|[Object]>
  - `errorText` <[string]> Human-readable error message, e.g. `'net::ERR_FAILED'`.

### param: ElementHandle.evalOnSelector.expression = %%-js-evalonselector-pagefunction-%%
* since: v1.9
### param: ElementHandle.evalOnSelectorAll.expression = %%-js-evalonselectorall-pagefunction-%%
* since: v1.9
### param: Frame.evalOnSelector.expression = %%-js-evalonselector-pagefunction-%%
* since: v1.9
### param: Frame.evalOnSelectorAll.expression = %%-js-evalonselectorall-pagefunction-%%
* since: v1.9
### param: Frame.evaluate.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: Frame.evaluateHandle.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: Frame.waitForFunction.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: JSHandle.evaluate.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: JSHandle.evaluateHandle.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: Page.evalOnSelector.expression = %%-js-evalonselector-pagefunction-%%
* since: v1.9
### param: Page.evalOnSelectorAll.expression = %%-js-evalonselectorall-pagefunction-%%
* since: v1.9
### param: Page.evaluate.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: Page.evaluateHandle.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: Page.waitForFunction.expression = %%-js-evaluate-pagefunction-%%
* since: v1.8
### param: Worker.evaluate.expression = %%-js-worker-evaluate-workerfunction-%%
* since: v1.8
### param: Worker.evaluateHandle.expression = %%-js-worker-evaluate-workerfunction-%%
* since: v1.8
### param: ElectronApplication.evaluate.expression = %%-js-electron-evaluate-workerfunction-%%
* since: v1.9
### param: ElectronApplication.evaluateHandle.expression = %%-js-electron-evaluate-workerfunction-%%
* since: v1.9
### param: Locator.evaluate.expression = %%-js-evaluate-pagefunction-%%
* since: v1.14
### param: Locator.evaluateAll.expression = %%-js-evaluate-pagefunction-%%
* since: v1.14
### param: Locator.evaluateHandle.expression = %%-js-evaluate-pagefunction-%%
* since: v1.14