Interesting research on mouse pointer interaction

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today , To achieve such an interesting interaction effect ：

Change the original mouse pointer style , Modify it to the desired effect , And add some special interaction effects .

Modify mouse style

First , The first question is , We can see , Above picture , The style of the mouse pointer has been changed to a dot ：

Normally it should be ：

Of course , Here's the easy part , stay CSS in , We can go through cursor style , Modify the mouse pointer shape .

utilize cursor Modify mouse style

cursor CSS Property to set the type of mouse pointer , Displays the corresponding style when the mouse pointer hovers over the element .

cursor: auto;
cursor: pointer;
...
cursor: zoom-out;
/*  Use pictures  */
cursor: url(hand.cur)
/*  Use pictures , And set up  fallback  The bottom line  */
cursor: url(hand.cur), pointer;

Everyone should know this , generally , In different scenes , Select different mouse pointer styles , It is also a means to improve the user experience .

Of course , In this interaction , We are not going to cursor Set the cursor to any style , Just the opposite , We need to hide him .

adopt cursor: none hide cursor

ad locum , We go through cursor: none Hide the mouse pointer of the page ：

{
    cursor: none;
}

In this way , The mouse pointer on the page disappears ：

Listen through global events , Simulate mouse pointer

since , Vanished , Let's simply simulate a mouse pointer .

We first implement a 10px x 10px Round div, Set to based on Absolute positioning ：

<div id="g-pointer">div>

#g-pointer {
    position: absolute;
    top: 0;
    left: 0;
    width: 10px;
    height: 10px;
    background: #000;
    border-radius: 50%;
}

that , On the page , We get a round black spot ：

next , Through event monitoring , monitor body Upper mousemove, The position of the small circle coincides with the position of the real-time mouse pointer ：

const element = document.getElementById("g-pointer");
const body = document.querySelector("body");

function setPosition(x, y) {
  element.style.transform  = `translate(${x}px, ${y}px)`;                
}

body.addEventListener('mousemove', (e) => {
  window.requestAnimationFrame(function(){
    setPosition(e.clientX - 5, e.clientY - 5);
  });
});

such , If not set cursor: none, It will be such an effect ：

Give again body add cursor: none, It is equivalent to simulating a mouse pointer ：

On this basis , Due to the current mouse pointer , It's actually a div, So we can add any interaction effect to it .

Take the example at the beginning of the article , We just need to use the hybrid mode mix-blend-mode: exclusion, The simulated mouse pointer can intelligently change its own color under different background colors .

There are still questions about the technique of mixed mode , Take a look at my article ： Use hybrid mode , Let the text intelligently adapt to the background color

Complete code ：

<p>Lorem ipsum dolor sit ametp>
<div id="g-pointer-1">div>
<div id="g-pointer-2">div>

body {
    cursor: none;
    background-color: #fff;
}
#g-pointer-1,
#g-pointer-2
{
    position: absolute;
    top: 0;
    left: 0;
    width: 12px;
    height: 12px;
    background: #999;
    border-radius: 50%;
    background-color: #fff;
    mix-blend-mode: exclusion;
    z-index: 1;
}
#g-pointer-2 {
    width: 42px;
    height: 42px;
    background: #222;
    transition: .2s ease-out;
}

const body = document.querySelector("body");
const element = document.getElementById("g-pointer-1");
const element2 = document.getElementById("g-pointer-2");
const halfAlementWidth = element.offsetWidth / 2;
const halfAlementWidth2 = element2.offsetWidth / 2;

function setPosition(x, y) { 
    element.style.transform  = `translate(${x - halfAlementWidth}px, ${y - halfAlementWidth}px)`;       element2.style.transform  = `translate(${x - halfAlementWidth2}px, ${y - halfAlementWidth2}px)`;
}

body.addEventListener('mousemove', (e) => {
  window.requestAnimationFrame(function(){
    setPosition(e.clientX, e.clientY);
  });
});

We can perfectly restore the effect of the title map ：

Complete code , You can poke here ：Mouse Cursor Transition

Pseudo class events trigger

One thing to note is that , Use the simulated mouse pointer to Hover Elements ,Click When the elements , You will find that these events cannot be triggered .

This is because , Under the hidden pointer , In fact, we simulate the hovering mouse pointer , therefore , be-all Hover、Click Events are triggered on this element .

Of course , This is also very easy to solve , We just need to give the element that simulates the pointer , add pointer-events: none, Block default mouse events , Let the event be transmitted through ：

{
    pointer-events: none;
}

The mouse follow , Not only in the

Of course , The core here is a mouse following animation , Match up cursor: none.

and , The mouse follow , We don't have to use JavaScript.

I am here It's incredibly pure CSS Mouse following In the article , A kind of pure CSS Achieve the mouse following effect , You can also have a look at those who are interested .

Based on pure CSS Mouse follow for , coordination cursor: none, You can also make some interesting animation effects . It's like this. ：

CodePen Demo – Cancle transition & cursor none

Last

This concludes the article , I hope it helps you

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