Create grammar
var txt = new String("string");
or
var txt = "string";
String object properties
| Attributes |
description |
| constructor |
Reference to the function that created the object |
| length |
The length of the string |
| prototype |
Allows you to add properties and methods to objects |
String object methods
| method |
描述 |
| charAt() |
Returns the character at the specified position |
| charCodeAt() |
Returns the Unicode encoding of the character at the specified position |
| concat() |
Concatenate two or more strings and return a new string |
| fromCharCode() |
Convert Unicode encoding to characters |
| indexOf() |
Returns the first occurrence of a specified string value in a string |
| lastIndexOf() |
Search string from back to front |
| match() |
Find one or more regular expression matches |
| replace() |
Find the matching substring in the string and replace the substring matching the regular expression |
| search() |
Find the value that matches the regular expression |
| slice() |
Extract a fragment of the string and return the extracted part in the new string |
| split() |
Split string into string array |
| substr() |
Extract the specified number of characters in the string from the starting index |
| substring() |
Extract characters between two specified index numbers in a string |
| toLowerCase() |
Convert string to lower case |
| toUpperCase() |
Convert string to uppercase |
| trim() |
Remove the white space on both sides of the string |
| valueOf() |
Returns the original value of a string object |
HTML packaging method for String
| 方法 |
描述 |
| anchor() |
Create HTML anchor |
| big() |
Display strings in large font |
| blink () displays the blinking string |
|
| bold() |
Use bold to display strings |
| fixed() |
Display string as typewriter text |
| fontcolor () |
Use the specified color to display the string |
| fontsize() |
Use the specified size to display the string |
| italics() |
Use italics to display strings |
| link() |
Display string as a link |
| small() |
Use small fonts to display strings |
| strike() |
Strikethrough character string |
| sub() |
Display string as subscript |
| sup() |
Display string as superscript |
Applications
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<script>
var txt = "Hello World!";
document.write("<p>字体变大: " + txt.big() + "</p>");
document.write("<p>字体缩小: " + txt.small() + "</p>");
document.write("<p>字体加粗: " + txt.bold() + "</p>");
document.write("<p>斜体: " + txt.italics() + "</p>");
document.write("<p>固定定位: " + txt.fixed() + "</p>");
document.write("<p>加删除线: " + txt.strike() + "</p>");
document.write("<p>字体颜色: " + txt.fontcolor("green") + "</p>");
document.write("<p>字体大小: " + txt.fontsize(6) + "</p>");
document.write("<p>下标: " + txt.sub() + "</p>");
document.write("<p>上标: " + txt.sup() + "</p>");
document.write("<p>链接: " + txt.link("http://www.w3cschool.cc") + "</p>");
document.write("<p>闪动文本: " + txt.blink() + " (不能用于IE,Chrome,或者Safari)</p>");
</script>
</body>
</html>
String object learning mind map
Excerpt from W3Cschool website.
