consolelog_sharepoint_listitems.js

/* Make sure jQuery is available. */
/* Make sure you have proper URL. */
$.ajax({
    url: "/_api/web/lists/GetByTitle('ListName')/Items",
    headers:
    {
        "Accept": "application/json;odata=nometadata",
        "Content-Type": "application/json;odata=nometadata",
        "odata-version": ""
    },
    success: function(data)
    {
        console.log(data);
    },
    error: function(data)
    {
        console.log(data.responseJSON.error);
    }
});