我想创建一个带有一些文本的chrome扩展,然后打开一个网站,并尝试将该文本写入文本字段。 这就是我所拥有的:
chrome.omnibox.onInputEntered.addListener(
function(text) {
chrome.tabs.create({url:"http://www.editpad.org/"});
document.getElementById("text").value = txt; //.innerHTML = txt
alert('You just typed "' + text + '"');
});
我从检查元素中获取了ID。 它需要做什么才能写出来?
答案 0 :(得分:2)
您的代码在(不可见)background或event page的上下文中运行。为了“切换”到您刚刚打开的页面的执行上下文,您需要使用content script(以编程方式,“动态”,使用chrome.tabs.executeScript
)。
下面带注释的代码显示了如何实现您想要的结果。
chrome.omnibox.onInputEntered.addListener(function(text) {
chrome.tabs.create({
url: 'http://www.editpad.org/'
}, function(tab) {
// chrome.tabs.executeScript takes a string that will be parsed and run
// as JavaScript code. To pass a string, you need to make sure that it
// does not contain any invalid characters. This can easily be achieved
// by serializing the input string to JSON.
var serializedValue = JSON.stringify(text);
chrome.tabs.executeScript(tab.id, {
code: 'document.getElementById("text").value = ' + serializedValue,
}, function(result) {
if (!result) {
// This usually happens when you do not have the permission to
// run code in the page. Add the site to the "permissions"
// section manifest.json.
alert('Failed to run content script.\n' +
chrome.runtime.lastError.message);
return;
}
// The value of the last expression is passed to the callback of
// chrome.tabs.executeScript, for each frame. The code runs only in
// the top-level frame (because `allFrames: true` is not specified),
// so the result is an array with only one element.
alert('You just typed: "' + result[0] + '"');
});
});
});