see if a object is inside another drag event in javascript

To check if an object is inside another during a drag event in JavaScript, we can use the drag events and DOM manipulation. We can add event listeners to both objects and check if one is inside the other during the drag event.

Here's an example code snippet:


index.tsx
// get both objects
const obj1 = document.getElementById('object1');
const obj2 = document.getElementById('object2');

// add dragstart event listener to obj1
obj1.addEventListener('dragstart', dragStart);

// add dragover event listener to obj2
obj2.addEventListener('dragover', dragOver);

// add dragleave event listener to obj2
obj2.addEventListener('dragleave', dragLeave);

// add drop event listener to obj2
obj2.addEventListener('drop', drop);

// dragStart function to set the data transfer
function dragStart(e) {
    e.dataTransfer.setData('text', e.target.id);
}

// dragOver function to prevent default behavior
function dragOver(e) {
    e.preventDefault();
    obj2.classList.add('hovered');
}

// dragLeave function to remove hover effect
function dragLeave() {
    obj2.classList.remove('hovered');
}

// drop function to append obj1 inside obj2
function drop(e) {
    e.preventDefault();
    const data = e.dataTransfer.getData('text');
    if (data === obj1.id) {
        obj2.appendChild(obj1);
        obj2.classList.remove('hovered');
    }
}
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In this example, we add event listeners to both objects: a dragstart event listener to obj1 and dragover, dragleave, and drop event listeners to obj2.

During the dragover event, we use the preventDefault() method to stop the default drag and drop behavior. We also add a CSS class to obj2 to indicate that it's being hovered.

In the dragleave event, we remove the CSS class added in dragover.

In the drop event, we check if the data (in this case, the id of obj1) matches, and if so, append obj1 to obj2 and remove the hover class.

With this implementation, we can check if obj1 is inside obj2 during a drag event.