將div元素拖動到特定位置時如何觸發模態？

Question

我正在為一個學校項目制作一個桌游網站。 我有一個可以拖動的div元素（圖像）。 目標是到達終點。 所以我的主要問題是，將圖像拖動到終點時如何觸發模態？ 以下是我編寫的將元素拖動到畫布上的代碼。

    var canvas = new fabric.Canvas('c', { selection: false });
    var grid = 35;

    // create grid

    for (var i = 0; i < (3000 / grid); i++) {
        canvas.add(new fabric.Line([ i * grid, 0, i * grid, 3000], { stroke: '#ccc', selectable: false }));
        canvas.add(new fabric.Line([ 0, i * grid, 3000, i * grid], { stroke: '#ccc', selectable: false }))
    }

    const url = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_geel.png';
    const url1 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_blauw.png';
    const url2 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_lichtblauw.png';
    const url3 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_lichtgroen.png';
    const url4 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_paars.png';
    const url5 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_rood.png';
    const url6 = 'https://oege.ie.hva.nl/~delawai/assets/images/Photos/bus_roze.png';

    fabric.Image.fromURL(url, (img) => {
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    }, {
//here you can set the positioning
        left: 1790,
        top: 40,
    });
    fabric.Image.fromURL(url1, (img) => {
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    }, {
//here you can set the positioning
        left: 1790,
        top: 100,
    });
    fabric.Image.fromURL(url2, (img) => {
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    }, {
//here you can set the positioning
        left: 1790,
        top: 150,
    });
    fabric.Image.fromURL(url3, (img) => {
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    }, {
//here you can set the positioning
        left: 1790,
        top: 200,
    });
    fabric.Image.fromURL(url4, (img) => {
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    }, {
//here you can set the positioning
        left: 1790,
        top: 250,
    });
    fabric.Image.fromURL(url5, (img) => {
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    }, {
//here you can set the positioning
        left: 1790,
        top: 300,
    });
    fabric.Image.fromURL(url6, (img) => {
//scale down the image but keeping the aspect ratio
        const width = 100;
        const height = 80;
        const widthFactor = width / img.width;
        const heightFactor = height/ img.height;
        const minFactor = Math.min(widthFactor, heightFactor);
        img.scale(minFactor);
        canvas.add(img)
    }, {
//here you can set the positioning
        left: 1790,
        top: 350,
    });
    canvas.on('object:moving', function(options) {
        options.target.set({
            left: Math.round(options.target.left / grid) * grid,
            top: Math.round(options.target.top / grid) * grid
        });
    });


})

Answer 1

開始在這里與碰撞檢測，並編寫啟動模式檢測發生后的功能。