Rotating a sprite towards the mouse pointer in phaser.js

rotate.js

 window.onload = function()
 {
    var game = new Phaser.Game(window.innerWidth, window.innerHeight, Phaser.AUTO, '', {
        preload: preload,
        create: create,
        update: update
    });

    var dragging = false;

    function preload ()
    {
        game.input.maxPointers = 1;
        game.load.image('logo', 'phaser.png');
    }

    function create ()
    {
        logo = game.add.sprite(game.world.centerX, game.world.centerY, 'logo');
        logo.anchor.setTo(0.5, 0.5);

    }

    function update()
    {
        var targetAngle = (360 / (2 * Math.PI)) * game.math.angleBetween(
          logo.x, logo.y,
          this.game.input.activePointer.x, this.game.input.activePointer.y) + 90;

        if(targetAngle < 0)
            targetAngle += 360;

        if(game.input.activePointer.isDown && !dragging)
        {
            dragging = true;
        }
        if(!game.input.activePointer.isDown && dragging)
        {
            dragging = false;
        }

        if(dragging)
        {
            logo.angle = targetAngle;
        }
    }
};

Incredibly easy. Well played

You can also rotate it in this way ( without 'dragging' variable ), just pass the game and the desired sprite, image etc, to the function

updateAngle(game, view) {
    const dx = game.input.activePointer.x - view.x;
    const dy = game.input.activePointer.y - view.y;
    const targetAngle = (360 / (2 * Math.PI)) * Math.atan2(dy, dx);

    view.angle = targetAngle;
  }

function update() {
    // passing this.game and for example some image like this._img
    updateAngle(this.game, this._img);
}