setcapture_phaser_input.js

phaser_Input_setCapture.ts

(function(property) {

    Phaser.Input.prototype.getCapture = function() {
        return this[property] && this[property].captor;
    }

    Phaser.Input.prototype.setCapture = function( inputHandlers ) {
        this[property] = this[property] || {captor:undefined,inputStack:[]};
        if ( 0 !== this[property].inputStack.length ) {this.releaseCapture();}
        this[property].inputStack.push( this.interactiveItems );
        if ( !(inputHandlers instanceof Object) ) { inputHandlers = [ inputHandlers ]; }
        this[property].captor = inputHandlers;
        this.interactiveItems = new Phaser.ArrayList();
        for ( var i in inputHandlers ) { this.interactiveItems.add( inputHandlers[i] ); }
    }

    Phaser.Input.prototype.releaseCapture = function() {
        if ( !this[property] ) return;
        this.interactiveItems = this[property].inputStack.pop();
        this[property].captor = undefined;
    }

})('_input_captor_');

My implementation of a setCapture/releaseCapture stack for Phaser.InputHandlers, put somewhere in your javascript after the Phaser module has been initialized.