Find Interview Questions for Cradlepoint

Create a button and call the java script function on any
event of created button.
In the java script function you can write statement to
submit the form. eg.
document.FormName.submit().

use javascript:document.formname.submit()

The eval() function evaluates a string and executes it as if
it was script code.
In this example we use eval() on some strings and see what
it returns:
<script type="text/javascript">
eval("x=10;y=20;document.write(x*y)");
document.write("<br />");
document.write(eval("2+2"));
document.write("<br />");
var x=10;
document.write(eval(x+17));
document.write("<br />");
</script>
The output of the code above will be:
200
4
27

‘stateful’ components are class components. They have one ‘state’ that is used for UI re-rendering.

We can create one list without ‘key’ for each element but it will cause issues with the react component rendering the list. Even on the browser console, it will throw one error.

Keys are used to provide each list element with a stable identity. The keys should be unique. The best practice is to use ‘id’ of the data as the key.

props are used to pass data to a component. They can hold single or multiple sets of values to pass to a component. They are mainly used to pass data to a component and to trigger any state changes.

Its mutual pattern in React which is used for a component to return multiple elements. Fragments let group a list of children without adding extra nodes to the DOM.