Checkbox and radio bindings in Svelte - Cheat Sheet & Quick Revision

Recall & Review

beginner

How do you bind a single checkbox to a boolean variable in Svelte?

Use the bind:checked directive on the checkbox input to link it to a boolean variable. For example: <input type="checkbox" bind:checked={isChecked} />.

intermediate

What happens when you bind multiple checkboxes to an array in Svelte?

Each checkbox's value is added to or removed from the array automatically as the user checks or unchecks them. Use bind:group on checkboxes to bind them to an array.

beginner

How do you bind a group of radio buttons to a single variable in Svelte?

Use bind:group on each radio input with the same variable. The variable will hold the value of the selected radio button.

beginner

What type of variable should you use to bind to a group of radio buttons?

Use a string or number variable that matches the value attribute of the radio buttons. This variable stores the selected option's value.

intermediate

Can you bind a checkbox to a variable other than boolean or array in Svelte?

No. A single checkbox binds to a boolean, and multiple checkboxes bind to an array. Other types are not supported for checkbox bindings.

Which directive binds a checkbox's checked state to a variable in Svelte?

A bind:checked

B bind:value

C bind:group

D bind:selected

The bind:checked directive links a checkbox's checked state to a boolean variable.

How do you bind multiple checkboxes to a single array variable in Svelte?

A Use bind:value on each checkbox

B Use bind:checked on each checkbox

C Use bind:group on each checkbox

D Use bind:selected on each checkbox

The bind:group directive binds multiple checkboxes to an array variable, managing the array automatically.

What value does a variable bound to a radio group hold?

A Array of selected values

B Value of the selected radio button

C Boolean true or false

D Number of selected radios

A variable bound to a radio group holds the value of the selected radio button.

Which input type uses bind:checked for binding in Svelte?

A Radio buttons

B Text inputs

C Select dropdowns

D Checkboxes

bind:checked is used for checkboxes to bind their checked state.

If you want to bind a group of radio buttons, which directive do you use?

A bind:group

B bind:value

C bind:checked

D bind:selected

Use bind:group to bind a group of radio buttons to a single variable.

Explain how to bind a single checkbox and multiple checkboxes in Svelte. Include the variable types used.

Think about how one checkbox differs from many checkboxes in binding.

Describe how to bind a group of radio buttons in Svelte and what the bound variable represents.

Consider how radio buttons let you pick only one option.