I been stuck on this question for awhile and I don’t see any issues with my .main-section’s:
“Each .main-section should have an id that matches the text of its first child, having any spaces in the child’s text replaced with underscores (_ ) for the id’s.”
I went through all my .main-section elements I don’t find an issue with any of them. Perhaps something i’m missing not sure. I would appreciate the help thank you.
Your code so far
<!DOCTYPE html>
<html>
<head>
<title>Technical Documentation</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" href="styles.css" />
</head>
<body>
<!--Navigation bar to link to the document-->
<nav id="navbar">
<header><h1>JS Documentation</h1></header>
<!--Nav Links-->
<ul>
<li><a class="nav-link" href="#Introduction">Introduction</a></li>
<li>
<a class="nav-link" href="#What_should_you_already_know"
>What should you already know</a
>
</li>
<li>
<a class="nav-link" href="#JavaScript_and_Java"
>JavaScript and Java</a
>
</li>
<li><a class="nav-link" href="#Hello_World">Hello World</a></li>
<li><a class="nav-link" href="#Variables">Variables</a></li>
<li>
<a class="nav-link" href="#Declaring_variables"
>Declaring variables</a
>
</li>
<li><a class="nav-link" href="#Variable_scope">Variable scope</a></li>
<li>
<a class="nav-link" href="#Global_variables">Global variables</a>
</li>
<li><a class="nav-link" href="#Constants">Constants</a></li>
<li><a class="nav-link" href="#Data_types">Data types</a></li>
<li>
<a class="nav-link" href="#if...else_statements"
>if...else statements</a
>
</li>
<li><a class="nav-link" href="#while_statement">while statement</a></li>
<li>
<a class="nav-link" href="#Function_declarations"
>Function declarations</a
>
</li>
<li><a class="nav-link" href="#Reference">Reference</a></li>
</ul>
</nav>
<!--main doc-->
<main id="main-doc">
<!--5 sec with headers-->
<section id="Introduction" class="main-section">
<header>
<h2>Introduction</h2>
</header>
<!--2 P elements about intro-->
<p>
JavaScript is a cross-platform, object-oriented scripting language. It
is a small and lightweight language. Inside a host environment (for
example, a web browser), JavaScript can be connected to the objects of
its environment to provide programmatic control over them.
</p>
<p>
JavaScript contains a standard library of objects, such as Array,
Date, and Math, and a core set of language elements such as operators,
control structures, and statements. Core JavaScript can be extended
for a variety of purposes by supplementing it with additional objects;
for example:
</p>
<!--Style display later-->
<code>JavaScript contains a libraray of objects</code>
<!--list items-->
<ul>
<li>
Client-side JavaScript extends the core language by supplying
objects to control a browser and its Document Object Model (DOM).
For example, client-side extensions allow an application to place
elements on an HTML form and respond to user events such as mouse
clicks, form input, and page navigation.
</li>
<li>
Server-side JavaScript extends the core language by supplying
objects relevant to running JavaScript on a server. For example,
server-side extensions allow an application to communicate with a
database, provide continuity of information from one invocation to
another of the application, or perform file manipulations on a
server.
</li>
</ul>
</section>
<!--What you should know-->
<section id="What_should_you_already_know" class="main-section">
<header>
<h2>What should you already know</h2>
</header>
<p>This guide assumes you have the following basic background:</p>
<ul>
<li>
A general understanding of the Internet and the World Wide Web
(WWW).
</li>
<li>Good working knowledge of HyperText Markup Language (HTML).</li>
<li>
Some programming experience. If you are new to programming, try one
of the tutorials linked on the main page about JavaScript.
</li>
</ul>
</section>
<!--Javascript and Java-->
<section id="JavaScript_and_Java" class="main-section">
<header>
<h2>JavaScript and Java</h2>
</header>
<!-- 3 P elements on Java-->
<p>
JavaScript and Java are similar in some ways but fundamentally
different in some others. The JavaScript language resembles Java but
does not have Java's static typing and strong type checking.
JavaScript follows most Java expression syntax, naming conventions and
basic control-flow constructs which was the reason why it was renamed
from LiveScript to JavaScript.
</p>
<p>
In contrast to Java's compile-time system of classes built by
declarations, JavaScript supports a runtime system based on a small
number of data types representing numeric, Boolean, and string values.
JavaScript has a prototype-based object model instead of the more
common class-based object model. The prototype-based model provides
dynamic inheritance; that is, what is inherited can vary for
individual objects. JavaScript also supports functions without any
special declarative requirements. Functions can be properties of
objects, executing as loosely typed methods.
</p>
<p>
JavaScript is a very free-form language compared to Java. You do not
have to declare all variables, classes, and methods. You do not have
to be concerned with whether methods are public, private, or
protected, and you do not have to implement interfaces. Variables,
parameters, and function return types are not explicitly typed.
</p>
</section>
<!--Hello World-->
<section id="Hello_World" class="main-section">
<header>
<h2>Hello World</h2>
</header>
<!--2 p elements about Hello world-->
<p>
To get started with writing JavaScript, open the Scratchpad and write
your first "Hello world" JavaScript code:
</p>
<!--Give it a richer display-->
<code
>function greetMe(yourName) { alert("Hello " + yourName); }
greetMe("World");</code
>
<p>
Select the code in the pad and hit Ctrl+R to watch it unfold in your
browser!
</p>
</section>
<!--Variables-->
<section id="Variables" class="main-section">
<header>
<h2>Variables</h2>
</header>
<!-- 2 P elements about variables-->
<p>
You use variables as symbolic names for values in your application.
The names of variables, called identifiers, conform to certain rules.
</p>
<p>
A JavaScript identifier must start with a letter, underscore (_), or
dollar sign ($); subsequent characters can also be digits (0-9).
Because JavaScript is case sensitive, letters include the characters
"A" through "Z" (uppercase) and the characters "a" through "z"
(lowercase).
</p>
<p>
You can use ISO 8859-1 or Unicode letters such as å and ü in
identifiers. You can also use the Unicode escape sequences as
characters in identifiers. Some examples of legal names are
Number_hits, temp99, and _name.
</p>
</section>
<!--Declaring Variables Section-->
<section id="Declaring_variables" class="main-section">
<header>
<h2>Declaring variables</h2>
</header>
<!--7 P elements-->
<p>You can declare a variable in three ways:</p>
<p>With the keyword var. For example,</p>
<!--code style display-->
<code>var x = 42.</code>
<p>
This syntax can be used to declare both local and global variables.<br />
By simply assigning it a value. For example,
</p>
<code>x = 42.</code>
<p>
This always declares a global variable. It generates a strict
JavaScript warning. You shouldn't use this variant. <br />
With the keyword let. For example,
</p>
<code>let y = 13.</code>
<p>
This syntax can be used to declare a block scope local variable. See
Variable scope below.
</p>
</section>
<!--Variable Scope-->
<section id="Variable_scope" class="main-section">
<!--Header-->
<header>
<h2>Variable scope</h2>
</header>
<p>
When you declare a variable outside of any function, it is called a
global variable, because it is available to any other code in the
current document. When you declare a variable within a function, it is
called a local variable, because it is available only within that
function.
</p>
<p>
JavaScript before ECMAScript 2015 does not have block statement scope;
rather, a variable declared within a block is local to the function
(or global scope) that the block resides within. For example the
following code will log 5, because the scope of x is the function (or
global context) within which x is declared, not the block, which in
this case is an if statement.
</p>
<code>if (true) { var x = 5; } console.log(x); // 5</code>
<p>
This behavior changes, when using the let declaration introduced in
ECMAScript 2015.
</p>
<code
>if (true) { let y = 5; } console.log(y); // ReferenceError: y is not
defined</code
>
</section>
<!--Global Variables-->
<section id="Global_variables" class="main-section">
<header>
<h2>Global variables</h2>
</header>
<p>
Global variables are in fact properties of the global object. In web
pages the global object is window, so you can set and access global
variables using the window.variable syntax.
</p>
<p>
Consequently, you can access global variables declared in one window
or frame from another window or frame by specifying the window or
frame name. For example, if a variable called phoneNumber is declared
in a document, you can refer to this variable from an iframe as
parent.phoneNumber.
</p>
</section>
<!--Constants-->
<section id="Constants" class="main-section">
<header>
<h2>Constants</h2>
</header>
<!--Paragraph statement-->
<p>
You can create a read-only, named constant with the const keyword. The
syntax of a constant identifier is the same as for a variable
identifier: it must start with a letter, underscore or dollar sign and
can contain alphabetic, numeric, or underscore characters.
</p>
<!--code block-->
<code>const PI = 3.14;</code>
<p>
A constant cannot change value through assignment or be re-declared
while the script is running. It has to be initialized to a value. The
scope rules for constants are the same as those for let block scope
variables.
</p>
<p>
If the const keyword is omitted, the identifier is assumed to
represent a variable.
</p>
<p>
You cannot declare a constant with the same name as a function or
variable in the same scope. For example:
</p>
<code
>// THIS WILL CAUSE AN ERROR function f() {}; const f = 5; // THIS
WILL CAUSE AN ERROR ALSO function f() { const g = 5; var g;
//statements }</code
>
<p>
However, object attributes are not protected, so the following
statement is executed without problems.
</p>
<code
>const MY_OBJECT = {"key": "value"}; MY_OBJECT.key =
"otherValue";</code
>
</section>
<section id="Data_types" class="main-section">
<header>
<h2>Data types</h2>
</header>
<p>The latest ECMAScript standard defines seven data types:</p>
<ul>
<li><p>Six data types that are primitives:</p></li>
</ul>
<ul class="circle">
<li>Boolean. true and false.</li>
<li>
null. A special keyword denoting a null value. Because JavaScript is
case-sensitive, null is not the same as Null, NULL, or any other
variant.
</li>
<li>undefined. A top-level property whose value is undefined.</li>
<li>Number. 42 or 3.14159.</li>
<li>String. "Howdy"</li>
<li>
Symbol (new in ECMAScript 2015). A data type whose instances are
unique and immutable.
</li>
</ul>
<ul>
<p>
<li>and Object</li>
</p>
</ul>
<p>
Although these data types are a relatively small amount, they enable
you to perform useful functions with your applications. Objects and
functions are the other fundamental elements in the language. You can
think of objects as named containers for values, and functions as
procedures that your application can perform.
</p>
</section>
<!--if statements-->
<section id="if...else_statements" class="main-section">
<header>
<h2>if...else statements</h2>
</header>
<!--paragraph statement-->
<p>
Use the if statement to execute a statement if a logical condition is
true. Use the optional else clause to execute a statement if the
condition is false. An if statement looks as follows:
</p>
<!--code block-->
<code>if (condition) { statement_1; } else { statement_2; }</code>
<p>
condition can be any expression that evaluates to true or false. See
Boolean for an explanation of what evaluates to true and false. If
condition evaluates to true, statement_1 is executed; otherwise,
statement_2 is executed. statement_1 and statement_2 can be any
statement, including further nested if statements.
</p>
<p>
You may also compound the statements using else if to have multiple
conditions tested in sequence, as follows:
</p>
<code
>if (condition_1) { statement_1; } else if (condition_2) {
statement_2; } else if (condition_n) { statement_n; } else {
statement_last; }</code
>
<p>
In the case of multiple conditions only the first logical condition
which evaluates to true will be executed. To execute multiple
statements, group them within a block statement ({ ... }) . In
general, it's good practice to always use block statements, especially
when nesting if statements:
</p>
<code
>if (condition) { statement_1_runs_if_condition_is_true;
statement_2_runs_if_condition_is_true; } else {
statement_3_runs_if_condition_is_false;
statement_4_runs_if_condition_is_false; }</code
>
<p>
It is advisable to not use simple assignments in a conditional
expression, because the assignment can be confused with equality when
glancing over the code. For example, do not use the following code:
</p>
<code>if (x = y) { /* statements here */ }</code>
<p>
If you need to use an assignment in a conditional expression, a common
practice is to put additional parentheses around the assignment. For
example:
</p>
<code>if ((x = y)) { /* statements here */ }</code>
</section>
<!--while statement-->
<section id="while_statement" class="main-section">
<header>
<h2>while statement</h2>
</header>
<!--paragrph-->
<p>
A while statement executes its statements as long as a specified
condition evaluates to true. A while statement looks as follows:
</p>
<!--code block-->
<code>while (condition) statement </code>
<p>
If the condition becomes false, statement within the loop stops
executing and control passes to the statement following the loop.
</p>
<p>
The condition test occurs before statement in the loop is executed. If
the condition returns true, statement is executed and the condition is
tested again. If the condition returns false, execution stops and
control is passed to the statement following while.
</p>
<p>
To execute multiple statements, use a block statement ({ ... }) to
group those statements.
</p>
<p>Example:</p>
<p>
The following while loop iterates as long as n is less than three:
</p>
<code>var n = 0; var x = 0; while (n < 3) { n++; x += n; }</code>
<p>
With each iteration, the loop increments n and adds that value to x.
Therefore, x and n take on the following values:
</p>
<ul>
<li>After the first pass: n = 1 and x = 1</li>
<li>After the second pass: n = 2 and x = 3</li>
<li>After the third pass: n = 3 and x = 6</li>
</ul>
<p>
After completing the third pass, the condition n < 3 is no longer
true, so the loop terminates.
</p>
</section>
<!--Function declarations section-->
<section id="Function_declarations" class="main-section">
<header>
<h2>Function declarations</h2>
</header>
<!--paragraph-->
<p>
A function definition (also called a function declaration, or function
statement) consists of the function keyword, followed by:
</p>
<!--unordered list-->
<ul>
<li>The name of the function.</li>
<li>
A list of arguments to the function, enclosed in parentheses and
separated by commas.
</li>
<li>
The JavaScript statements that define the function, enclosed in
curly brackets, { }.
</li>
</ul>
<p>
For example, the following code defines a simple function named
square:
</p>
<!--code block-->
<code>function square(number) { return number * number; }</code>
<p>
The function square takes one argument, called number. The function
consists of one statement that says to return the argument of the
function (that is, number) multiplied by itself. The return statement
specifies the value returned by the function.
</p>
<code>return number * number;</code>
<p>
Primitive parameters (such as a number) are passed to functions by
value; the value is passed to the function, but if the function
changes the value of the parameter, this change is not reflected
globally or in the calling function.
</p>
</section>
<!--Refernce-->
<section id="Reference" class="main-section">
<header>
<h2>Reference</h2>
</header>
<ul>
<!--List with a link address-->
<li>
All the documentation in this page is taken from
<a
class="reference"
href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide"
>MDN</a
>
</li>
</ul>
</section>
</main>
</body>
</html>