Javascript Greasemonkey脚本中未定义innerText
我编写了查询文档中匹配字符串的代码,并根据获得的字符串生成URL。它通过标记元素查找匹配项,生成URL字符串,然后将链接附加到指定的Javascript Greasemonkey脚本中未定义innerText,javascript,greasemonkey,scope,Javascript,Greasemonkey,Scope,我编写了查询文档中匹配字符串的代码,并根据获得的字符串生成URL。它通过标记元素查找匹配项,生成URL字符串,然后将链接附加到指定的parentNode对象。这段代码在普通javascript中运行良好,但当我将其粘贴到Greasemonkey中时,它就会崩溃。我不明白为什么 当我将其粘贴到chrome控制台中时,这是一个完全工作的版本: //loop through elements by classname and find string matches regexQueryEmail =
parentNode
对象。这段代码在普通javascript中运行良好,但当我将其粘贴到Greasemonkey中时,它就会崩溃。我不明白为什么
当我将其粘贴到chrome控制台中时,这是一个完全工作的版本:
//loop through elements by classname and find string matches
regexQueryEmail = "(AccountEmailAddress\\s)(.+?)(\\n)"
regexQueryContact = "(Contact with ID: )(.+?)(\\D)"
var Tags = document.getElementsByClassName('msg-body-div')
for (i = 0; i < Tags.length; i++) {
matchEmail = Tags[i].innerText.match(regexQueryEmail)
matchContact = Tags[i].innerText.match(regexQueryContact)
if (matchEmail != null) {
var emailString = matchEmail[2]
var placeHolder = Tags[i]
}
if (matchContact != null) {
var idString = matchContact[2]
}
}
var urlFirst = "https://cscentral.foo.com/gp/stores/www.foo.com/gp/communications/manager/main/191- 4559276-8054240?ie=UTF8&customerEmailAddress="
var urlSecond = "%3E&initialCommId="
var cscURL = urlFirst + emailString + urlSecond + idString
var cscLink = document.createElement('a')
cscLink.innerText = 'Communication History'
cscLink.href = cscURL
placeHolder.parentNode.appendChild(cscLink)
它还告诉我“占位符”未定义,但我现在无法复制它。我觉得这与变量的作用域有关。我在脚本的顶部添加了“var标签”和“var占位符”,但没有任何帮助 Firefox使用
元素.textContent
属性
中的变量占位符
从未在尝试使用它的范围内声明。相反,它是在for
循环中的某个地方声明的。确保在同一范围内声明它
例如
var Tags=document.getElementsByClassName('msg-body-div'))
变量占位符;//在同一范围内声明
对于(var i=0;i
/*
Exception: Tags[i].innerText is undefined
@Scratchpad:18
*/
var Tags = document.getElementsByClassName('msg-body-div')
var placeholder; // declare in same scope
for (var i = 0; i < Tags.length; i++) {
// lookup the tag once
var tag = Tags[i];
// get the text only once
var text = tag.textContent;
matchEmail = text.match(regexQueryEmail)
matchContact = text.match(regexQueryContact)
if (matchEmail != null) {
var emailString = matchEmail[2]
placeHolder = tag // deleted var statement
}
if (matchContact != null) {
var idString = matchContact[2]
}
}
...
// now you can use it.
if (placeHolder) {
placeHolder.parentNode.appendChild(cscLink);
}