Set Value of Input Using Javascript Function

'Erase Drawing Board': Clearing Input Field

If you've ever needed to reset a form or clear a search bar, change 'Your Value' to an empty string ('').

document.querySelector('input#inputId').value = '';
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It's akin to shaking an Etch A Sketch: everything you've drawn just poofs away!

Digging Deeper: More on Input Value Manipulation

Field Trips are Fun: Using Frameworks

Nobody minds a helping hand, and JavaScript frameworks are your backstage crew. To perform the same operation:

• jQuery: Execute $('#inputId').val('');.
• YUI: Use Dom.get('inputId').set('value', '');.

'Undefined' Identity: JavaScript vs jQuery

Keep alert when dealing with undefined:

• Plain JavaScript: If you set undefined, the input displays the string "undefined". Talk about wearing your name tag!
• jQuery: Much like a kind-hearted primary school teacher, it sets undefined as an empty value.

Situational Awareness: Dynamic Value Assignment

Tell Me A Story: Event-driven Interactions

Event listeners set the stage for changing input values dynamically. Consider a button that clears or updates an input field upon clicking:

document.querySelector('button#clearButton').addEventListener('click', function() {
  var inputField = document.querySelector('input#inputId');
  if(inputField.value) { // As a philosopher once asked, "If an input field is not empty, does it need clearing?"
    inputField.value = ''; // "Yes", says the Zen JavaScript Master.
  }
});
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Condition Check: Condition-based Assignment

Ensure you admit only the right guests into the party. Set the input value if and only if the conditions are met:

if (isValid(newValue)) {
  document.querySelector('input#inputId').value = newValue;
} else {
  alert('Invalid input!'); // Security! We have a party crasher!
}
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Plot Twist: Changing Value During Runtime

Pandemonium in the Palace: Direct Property Access vs Setter Methods

Directly dealing with properties like .value is straightforward but might feel like attempting ballet with two left feet. Meanwhile, setter methods, such as jQuery's .val(), feel like poetry in code, abstracting cross-browser compatibility.

Twists and Turns: Event Delegation for Dynamic Forms

Using event delegation, you can ensure events bubble up from child elements for dynamically changing forms. It’s like hiring efficient gossipmongers to ensure the news reaches the king (parent elements)!

Becoming a Marvel Character: Manipulating MVC5 Inputs

MVC5 applications and single-page applications (SPAs) can leverage JavaScript to instantly update input fields. It’s almost as if fields self-heal like Wolverine from X-Men.

The Grand Amplifier: Going Beyond the Basic

Possible Scenarios: Real-world Applications

In various situations, manipulating input values might be key:

• Prefilling user data for a more convenient UX
• Autoclearing of placeholder text on focus
• Saving previous user input to prevent data loss on refresh

Foreseeing the Unforeseen: Edge Cases

It’s a wild, wild web out there! To handle unexpected behaviour:

• Browser Autofill: Watch out for browser settings that preempt your values. Browsers do get a bit overexcited at times!
• Input Validation: Not all values are equal. Keep an eye open for those sneaky invalid values!
• Accessibility Concerns: Everyone deserves to enjoy your web application. Keep it accessible!

Upgrade Thyself: Newer APIs

Stay updated with the freshest strategies, such as the InputEvent interface. Understanding the new input event will help you devise cutting-edge solutions!