Differences between count() and length() methods in Protractor

Question

Differences between count() and length() methods in Protractor

When it comes to determining the number of elements inside the ElementArrayFinder (which is the result of calling element.all()), you have two options according to the documentation:

$$(".myclass").length, detailed here:

This approach involves using the length property which is equal to the number of elements found by the ElementArrayFinder. Each element in the array represents the outcome of an action performed on that specific element.

$$(".myclass").count(), explained here:

With this method, you can count the total number of elements indicated by the ElementArrayFinder.

What sets these two methods apart and which one would be considered more preferable?

javascript angularjs selenium selenium-webdriver protractor

Answer 1

Answer №1

`$$(".myclass").size()`

In order to accurately retrieve the length of elements, it is necessary to resolve the promise.

// FUNCTIONAL
$$(".myclass").then(function(items){
  items.length;
});

// NOT FUNCTIONAL
$$(".myclass").length;

`$$(".myclass").count()`

This function serves as a wrapper for $$('.myclass').length, eliminating the need to resolve promises like .length.

$$(".myclass").count();

Which approach should be favored?

If no complex business logic is involved in locating $$(".myclass") and using .then(function(items){...}), then items.length will offer better performance.

Otherwise, $$(".myclass").count() is recommended for general use.

Answer 2

`$$(".myclass").size()`

In order to accurately retrieve the length of elements, it is necessary to resolve the promise.

// FUNCTIONAL
$$(".myclass").then(function(items){
  items.length;
});

// NOT FUNCTIONAL
$$(".myclass").length;

`$$(".myclass").count()`

This function serves as a wrapper for $$('.myclass').length, eliminating the need to resolve promises like .length.

$$(".myclass").count();

Which approach should be favored?

If no complex business logic is involved in locating $$(".myclass") and using .then(function(items){...}), then items.length will offer better performance.

Otherwise, $$(".myclass").count() is recommended for general use.

Differences between count() and length() methods in Protractor

Answer №1

`$$(".myclass").size()`

`$$(".myclass").count()`

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