javascript EOL 的错误转义
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Bad escaping of EOL
提问by J.Zil
I am trying to work with a simple WYSIWYG editor. JSLint is saying it has "Bad escaping of EOL". Since I am new to javascript I am having a hard time figuring out what it means, since I am working with code found online. Can anyone tell me please what I should be doing instead of ending the line with a slash?
我正在尝试使用一个简单的 WYSIWYG 编辑器。JSLint 说它有“EOL 的错误转义”。由于我是 javascript 新手，我很难弄清楚它的含义，因为我正在使用在线找到的代码。谁能告诉我我应该做什么而不是用斜线结束行？
Here is the code in question: http://jsfiddle.net/spadez/KSA5e/9/
这是有问题的代码：http: //jsfiddle.net/spadez/KSA5e/9/
/*
* WYSIWYG EDITOR BASED ON JQUERY RTE
*/
// define the rte light plugin
(function ($) {
if (typeof $.fn.rte === "undefined") {
var defaults = {
content_css_url: "rte.css",
dot_net_button_class: null,
max_height: 350
};
$.fn.rte = function (options) {
$.fn.rte.html = function (iframe) {
return iframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML;
};
// build main options before element iteration
var opts = $.extend(defaults, options);
// iterate and construct the RTEs
return this.each(function () {
var textarea = $(this);
var iframe;
var element_id = textarea.attr("id");
// enable design mode
function enableDesignMode() {
var content = textarea.val();
// Mozilla needs this to display caret
if ($.trim(content) === '') {
content = '<br />';
}
// already created? show/hide
if (iframe) {
console.log("already created");
textarea.hide();
$(iframe).contents().find("body").html(content);
$(iframe).show();
$("#toolbar-" + element_id).remove();
textarea.before(toolbar());
return true;
}
// for compatibility reasons, need to be created this way
iframe = document.createElement("iframe");
iframe.frameBorder = 0;
iframe.frameMargin = 0;
iframe.framePadding = 0;
iframe.height = 200;
if (textarea.attr('class')) iframe.className = textarea.attr('class');
if (textarea.attr('id')) iframe.id = element_id;
if (textarea.attr('name')) iframe.title = textarea.attr('name');
textarea.after(iframe);
var css = "";
if (opts.content_css_url) {
css = "<link type='text/css' rel='stylesheet' href='" + opts.content_css_url + "' />";
}
var doc = "<html><head>" + css + "</head><body class='frameBody'>" + content + "</body></html>";
tryEnableDesignMode(doc, function () {
$("#toolbar-" + element_id).remove();
textarea.before(toolbar());
// hide textarea
textarea.hide();
});
}
function tryEnableDesignMode(doc, callback) {
if (!iframe) {
return false;
}
try {
iframe.contentWindow.document.open();
iframe.contentWindow.document.write(doc);
iframe.contentWindow.document.close();
} catch (error) {
console.log(error);
}
if (document.contentEditable) {
iframe.contentWindow.document.designMode = "On";
callback();
return true;
} else if (document.designMode !== null) {
try {
iframe.contentWindow.document.designMode = "on";
callback();
return true;
} catch (error) {
console.log(error);
}
}
setTimeout(function () {
tryEnableDesignMode(doc, callback);
}, 500);
return false;
}
function disableDesignMode(submit) {
var content = $(iframe).contents().find("body").html();
if ($(iframe).is(":visible")) {
textarea.val(content);
}
if (submit !== true) {
textarea.show();
$(iframe).hide();
}
}
// create toolbar and bind events to it's elements
function toolbar() {
var tb = $("<div class='rte-toolbar' id='toolbar-" + element_id + "'><div>\
<p>\
<a href='#' class='bold'>Bold</a>\
<a href='#' class='italic'>Italic</a>\
<a href='#' class='unorderedlist'>List</a>\
</p></div></div>");
$('.bold', tb).click(function () {
formatText('bold');
return false;
});
$('.italic', tb).click(function () {
formatText('italic');
return false;
});
$('.unorderedlist', tb).click(function () {
formatText('insertunorderedlist');
return false;
});
// .NET compatability
if (opts.dot_net_button_class) {
var dot_net_button = $(iframe).parents('form').find(opts.dot_net_button_class);
dot_net_button.click(function () {
disableDesignMode(true);
});
// Regular forms
} else {
$(iframe).parents('form').submit(function () {
disableDesignMode(true);
});
}
var iframeDoc = $(iframe.contentWindow.document);
var select = $('select', tb)[0];
iframeDoc.mouseup(function () {
setSelectedType(getSelectionElement(), select);
return true;
});
iframeDoc.keyup(function () {
setSelectedType(getSelectionElement(), select);
var body = $('body', iframeDoc);
if (body.scrollTop() > 0) {
var iframe_height = parseInt(iframe.style['height']);
if (isNaN(iframe_height)) iframe_height = 0;
var h = Math.min(opts.max_height, iframe_height + body.scrollTop()) + 'px';
iframe.style['height'] = h;
}
return true;
});
return tb;
}
function formatText(command, option) {
iframe.contentWindow.focus();
try {
iframe.contentWindow.document.execCommand(command, false, option);
} catch (e) {
//console.log(e)
}
iframe.contentWindow.focus();
}
function setSelectedType(node, select) {
while (node.parentNode) {
var nName = node.nodeName.toLowerCase();
for (var i = 0; i < select.options.length; i++) {
if (nName == select.options[i].value) {
select.selectedIndex = i;
return true;
}
}
node = node.parentNode;
}
select.selectedIndex = 0;
return true;
}
function getSelectionElement() {
if (iframe.contentWindow.document.selection) {
// IE selections
selection = iframe.contentWindow.document.selection;
range = selection.createRange();
try {
node = range.parentElement();
} catch (e) {
return false;
}
} else {
// Mozilla selections
try {
selection = iframe.contentWindow.getSelection();
range = selection.getRangeAt(0);
} catch (e) {
return false;
}
node = range.commonAncestorContainer;
}
return node;
}
// enable design mode now
enableDesignMode();
}); //return this.each
}; // rte
} // if
$(".rte-zone").rte({});
})(jQuery);
EDIT: For bonus marks there are also two other errors which I haven't been able to squish -
编辑：对于加分，还有另外两个我无法解决的错误-
- Missing radix parameter
- Height is better written in dot notation
- 缺少基数参数
- 高度最好用点表示法书写
回答by Alnitak
JS didn't support end-of-line escaping with \until ES5 - you can use multiple strings with a +operator instead, i.e.
JS\直到 ES5才支持行尾转义- 您可以使用多个字符串和一个+运算符来代替，即
"string 1" +
"string 2" +
"string 3"
Re: your other questions:
回复：您的其他问题：
Use
parseInt(n, 10)to force base (aka radix) 10, i.e. decimalUse
iframe.style.heightinstead ofiframe.style['height']
使用
parseInt(n, 10)武力基地（又称基数）10，即十进制使用
iframe.style.height代替iframe.style['height']
回答by Tiagojdferreira
You have two options:
您有两个选择：
1) activate multistr: trueas suggested by @csharpfolk. (You can do it at file level by adding /*jshint multistr: true */or add it in your linter config file (.jshintrc, .eslintrc, etc.)).
1)multistr: true按照@csharpfolk 的建议激活。（您可以通过添加在文件级做/*jshint multistr: true */或将其添加在你的棉短绒配置文件（.jshintrc，.eslintrc，等））。
2) Replace your multistring as suggested by @Altinak or use an array and join:
2）按照@Altinak的建议替换您的多字符串或使用数组并加入：
["string 1",
"string 2",
"string 3",
].join('')
["string 1",
"string 2",
"string 3",
].join('')
