如何在JavaScript数组中访问对象文字的属性

Question

Can you tell me what is wrong with this javascript code? It seems like the countries array is not getting initialized correctly, because it doesn't even make it past the initialization to the second document.write("test2"); line:

<script>
document.write("test1");
var countries;
countries = [
    {
        name: 'France',
        continent: 'Europe',
        cities: ['Paris', 'Nice'],
        photos: [france1.jpg, france2.jpg]
    },
    {
        name: 'Mexico',
        continent: 'North America',
        cities: ['Tijuana', 'Cancun', 'Mexico City'],
        photos: [mexico1.jpg, mexico2.jpg, mexico3.jpg]
    },
    {
        name: 'China',
        continent: 'Asia',
        cities: ['Beijing', 'Shanghai', 'Hong Kong'],
        photos: [china1.jpg, china2.jpg]
    }
];
document.write("test2");
document.write(countries[0].name);

</script>

Answer 1

The 'photos' need to be quoted. For example,

{
    name: 'France',
    continent: 'Europe',
    cities: ['Paris', 'Nice'],
    photos: ['france1.jpg', 'france2.jpg']
}

A quick check of your Javascript error console should have shown you this.

Answer 2

您必须在photos变量中输入字符串（'france1.jpg，'）。