如何使用JavaScript在特定單詞之前切分文本

Question

我使用JavaScript獲取div的html值。它返回像

From looking down the Line, he turned himself about again, and, raising his eyes, saw my figure high above him.Without prolonging the narrative to dwell on any one of its curious circumstances more than on any other, I may, in closing it, point out the coincidence that the warning of the Engine-Driver included, not only the words which the unfortunate Signal-man had repeated to me as haunting him, but also the words which I myself—not he—had attached, and that only in my own mind, to the gesticulation he had imitated. 

我需要之前和特定text.unfortunate後切片值是特定的詞的價值。例如，我需要得到像下面

....引擎驅動程序包括，不僅不幸的話信號人重複了我，作爲困擾他，但也是我自己的話。 ...

Answer 1

基於更新的評論，您需要突出的話，所以你可以用一個簡單的正則表達式使用.replace（）之類

$('div').html(function(_, html){ 
    return html.replace(/(unfortunate)/gi, '<b>$1</b>') 
}) 

演示：Fiddle

Answer 2

您可以使用indexOf()和substring()的組合。使用indexOf（「unfornate」）查找不幸的詞的索引，然後使用該索引找到子字符串。

Answer 3

如果你想分裂字符串考慮逗號（，）作爲分隔符，那麼你應該做的像，

var yourString='From looking down the Line, he turned himself about again, and, raising his eyes, saw my figure high above him.Without prolonging the narrative to dwell on any one of its curious circumstances more than on any other, I may, in closing it, point out the coincidence that the warning of the Engine-Driver included, not only the words which the unfortunate Signal-man had repeated to me as haunting him, but also the words which I myself—not he—had attached, and that only in my own mind, to the gesticulation he had imitated.'; 

var arrResult=yourString.split(','); //this will return an array 

DEMO

Answer 4

假設你的文本是divtxt然後使用這個

var splitText=divtxt.split("unfortunate"); 

splitText [0]在「不幸」之前將具有文本，而splitText [1]將在「不幸」之後具有文本「

Answer 5

如果你想 - 」......引擎驅動程序包括在內，不僅是那些不幸的信號人重複給我的話讓他困擾，還有我自己的話......「

var str = "From looking down the Line, he turned himself about again, and, raising his eyes, saw my figure high above him.Without prolonging the narrative to dwell on any one of its curious circumstances more than on any other, I may, in closing it, point out the coincidence that the warning of the Engine-Driver included, not only the words which the unfortunate Signal-man had repeated to me as haunting him, but also the words which I myself—not he—had attached, and that only in my own mind, to the gesticulation he had imitated." 
    var i = str.indexOf('unfortunate'); 
    var j = str.indexOf('Engine'); 
    var k = str.indexOf('myself') 
    var result = "..." + str.substring(j,i) + str.substring(i,k) + "...";