Let's say I retrieve the value of a <textarea> using jQuery. How can I then replace a portion of the value using JavaScript/jQuery. For example:
假设我使用jQuery检索
string: "Hey I'm $$zach$$"
字符串：“嘿，我是$$ zach $$”
replace $$zach$$ with <i>Zach</i>
用 Zach 替换$$ zach $$
And still keep the rest of the string intact?
并保持其余的字符串完好无损？
4 个解决方案
#1
33
Use a regex replace:
使用正则表达式替换：
yourTextArea.value = yourTextArea.value.replace(/\$\$(.+?)\$\$/, '<i>$1</i>')
Explanation of the regex:
正则表达式的解释：
\$\$ two dollar signs
( start a group to capture
. a character
+ one or more
? lazy capturing
) end the group
\$\$ two more dollar signs
The capture group is then used in the string '<i>$1</i>'. $1 refers to the group that the regex has captured.
然后在字符串' $ 1 '中使用捕获组。 1美元是指正则表达式捕获的组。
#2
9
Use this:
用这个：
str.replace(/\${2}(.*?)\${2}/g, "<I>$1</I>");
\${2} matches two $ characters
(.*?) matches your string to be wrapped
\${2} same as above
/g matches globally
的jsfiddle
If you wanted something in jQuery:
如果你想要jQuery中的东西：
$("#txt").val().replace(/\${2}(.*?)\${2}/g, "<I>$1</I>");
Markup:
标记：
<textarea id="txt">I'm $$Zach$$</textarea>
的jsfiddle
Wrap it in a function for best use:
将其包装在一个功能中以便最佳使用：
var italics = function (str) {
return str.replace(/\$\$(.*?)\$\$/g, "<I>$1</I>");
}
italics($("#txt").val());
Seems like you want to make a syntax similar to Markdown. Why not just use a Markdown parser for your fields instead of reinventing the wheel?
好像你想要制作类似于Markdown的语法。为什么不在你的领域使用Markdown解析器而不是重新发明*呢？
Showdown JS is actively developed and you get the same Markdown syntax as with any other markdown syntax.
Showdown JS正在积极开发中，您可以获得与任何其他markdown语法相同的Markdown语法。
#3
3
Using the string .replace method will do.
使用字符串.replace方法可以。
.replace(/\$\$(.*?)\$\$/g, '<I>$1</I>')
#4
2
Use this, change link and tag for extended linkify function :
使用此选项，更改链接和标记以扩展linkify功能：
String.prototype.linkify = function() {
var wikipediaPattern = /<wikipedia>(.+?)<\/wikipedia>/g;
return this.replace(wikipediaPattern, '<a href="http://fr.wikipedia.org/wiki/$1">$1</a>');
}
#1
33
Use a regex replace:
使用正则表达式替换：
yourTextArea.value = yourTextArea.value.replace(/\$\$(.+?)\$\$/, '<i>$1</i>')
Explanation of the regex:
正则表达式的解释：
\$\$ two dollar signs
( start a group to capture
. a character
+ one or more
? lazy capturing
) end the group
\$\$ two more dollar signs
The capture group is then used in the string '<i>$1</i>'. $1 refers to the group that the regex has captured.
然后在字符串' $ 1 '中使用捕获组。 1美元是指正则表达式捕获的组。
#2
9
Use this:
用这个：
str.replace(/\${2}(.*?)\${2}/g, "<I>$1</I>");
\${2} matches two $ characters
(.*?) matches your string to be wrapped
\${2} same as above
/g matches globally
的jsfiddle
If you wanted something in jQuery:
如果你想要jQuery中的东西：
$("#txt").val().replace(/\${2}(.*?)\${2}/g, "<I>$1</I>");
Markup:
标记：
<textarea id="txt">I'm $$Zach$$</textarea>
的jsfiddle
Wrap it in a function for best use:
将其包装在一个功能中以便最佳使用：
var italics = function (str) {
return str.replace(/\$\$(.*?)\$\$/g, "<I>$1</I>");
}
italics($("#txt").val());
Seems like you want to make a syntax similar to Markdown. Why not just use a Markdown parser for your fields instead of reinventing the wheel?
好像你想要制作类似于Markdown的语法。为什么不在你的领域使用Markdown解析器而不是重新发明*呢？
Showdown JS is actively developed and you get the same Markdown syntax as with any other markdown syntax.
Showdown JS正在积极开发中，您可以获得与任何其他markdown语法相同的Markdown语法。
#3
3
Using the string .replace method will do.
使用字符串.replace方法可以。
.replace(/\$\$(.*?)\$\$/g, '<I>$1</I>')
#4
2
Use this, change link and tag for extended linkify function :
使用此选项，更改链接和标记以扩展linkify功能：
String.prototype.linkify = function() {
var wikipediaPattern = /<wikipedia>(.+?)<\/wikipedia>/g;
return this.replace(wikipediaPattern, '<a href="http://fr.wikipedia.org/wiki/$1">$1</a>');
}