我正在创建一个Greasemonkey / Tampermonkey脚本,它将一些统计信息放入一个数组中。
使用JavaScript,如何在后台加载网址(football.fantasysports.yahoo.com/f1/326198/pointsagainst?pos=QB)并创建包含前两列(Rank
和Team
)的数组?
我遇到的问题是在后台完成所有这些工作,我认为我会使用AJAX。任何帮助将不胜感激。
答案 0 :(得分:2)
对于静态页面(例如the one you linked),请使用GM_xmlhttpRequest()
和DOMParser
来提取所需的元素。见下文。
对于动态页面 (AJAX驱动),请使用How to get an AJAX get-request to wait for the page to be rendered before returning a response?
中的技巧此处一个完整的脚本,展示如何从第三方网页中提取信息并将其转换为数组变量:
// ==UserScript==
// @name _Grab stuff of a *static*, third-party web site.
// @include https://stackoverflow.com/questions/*
// @require http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @grant GM_xmlhttpRequest
// ==/UserScript==
GM_xmlhttpRequest ( {
method: "GET",
url: "http://football.fantasysports.yahoo.com/f1/326198/pointsagainst?pos=QB&ntid=",
onload: parseResponse,
onerror: function (e) { console.error ('**** error ', e); },
onabort: function (e) { console.error ('**** abort ', e); },
ontimeout: function (e) { console.error ('**** timeout ', e); }
} );
function parseResponse (response) {
var parser = new DOMParser ();
/* IMPORTANT!
1) For older browsers, see
https://developer.mozilla.org/en-US/docs/Web/API/DOMParser
for a work-around.
2) jQuery.parseHTML() and similar is bad because it causes images, etc., to be loaded.
*/
var ajaxDoc = parser.parseFromString (response.responseText, "text/html");
var statRows = ajaxDoc.querySelectorAll ("#statTable0 > tbody > tr");
var newStatTable = $(statRows).map ( function () {
var tblRow = $(this);
var teamRank = parseInt (tblRow.find (".rank-indicator").text().trim(), 10);
var teamName = tblRow.find ("td:eq(1)").text().trim();
return [ [teamRank, teamName] ];
} ).get ();
/*-- newStatTable, is a 2-D array like:
[ [1, "Team A"],
[2, "Team B"],
[3, "Team C"],
//etc...
]
*/
console.log (newStatTable);
//alert (newStatTable);
}
答案 1 :(得分:0)
我想你想做点什么:
// ==UserScript==
// @name Fantasy Stuff
// @namespace http://football.fantasysports.yahoo.com/f1/326198/pointsagainst?pos=QB&ntid=
// @description An example of Fantasy Stuff
// @include *
// ==/UserScript==
var doc = document;
function T(t){
return doc.getElementsByTagName(t);
}
var tms = T('tbody')[0].getElementsByTagName('a'), teams = [];
for(var i=0,n=1,l=tms.length; i<l; i++,n++){
teams[n] = tms[i].text;
}
// teams array should hold results
console.log(teams); // in FireFox