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JavaScript

Table of Contents

File globbing
#

glob.sync("../*/*.xlsm").forEach(function (file) {
  console.log(file);
});

Read subfolders
#

dirs = FS.readdirSync(path);

Convert Time
#

let date = moment(
  "01/23/18",
  ["MM/DD/YY", "M/DD/YY", "MM/D/YY", "M/D/YY"],
  true,
);
if (date.isValid()) {
  console.log(date.format("DD.MM.YY"));
}

Check for undefined and not null
#

if (typeof variable != "undefined" && variable) {
  console.log("Good");
}

For loops
#

for (let input of inputs) {
  console.log(input);
}

IE not rendering Javascript
#

<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
</head

Transpiler error lines mapping
#

Add to your entrypoint the following snippet

require("source-map-support").install();

npm install dev-dependencies source-map-support

Reload content on change
#

index.html

<script type="text/javascript">
  app.main();
</script>
<body>
  <form>
    <select id="year" name="year">
      <option value="2017">2017</option>
      <option selected="selected" value="2018">2018</option>
    </select>
  </form>
</body>

app.js

static main () {
    $(document).ready(() => {
        this.draw() // do stuff
        $("#year").change(() => {
            this.draw()
        })
    })
}

Set content of textarea
#

document.getElementById("id").value = data;

NPM
#

Access modules hosted is a private Nexus
#

Tested with NPM 8.19.3/9.5.0 and Node 16.19.0/19.7.0

These options will configure your user’s npmrc file. Refer to the docs which config files are available.
npm config set @foo:registry https://nexus.example.com/repository/npm-group/
npm config set //nexus.example.com/repository/npm-group/_auth="$(echo -n 'admin:password' | base64)"

or

npm login --scope=@foo --registry=https://nexus.example.com/repository/npm-group/
recommended from the docs
This generates a bearer token for the provided user. Therefore, your Nexus must be configured with the bearer token permission.

or


npm config set @id:registry https://nexus.example.com/repository/npm-group/
export NEXUS_TOKEN=YETc...
npm config set //nexus.example.com/repository/npm-group/\_auth=${NEXUS_TOKEN}

Test

npm install --save @foo/awesome_module

Module management
#

npm list -g --depth=0
npm uninstall -g MODULE

Remove all global modules:

del %APPDATA%\npm

npm ls -gp --depth=0 | awk -F/ '/node_modules/ && !/\/npm$/ {print $NF}' | xargs npm -g rm

Automatically check your dependencies in your package.json for vulnerabilities

npm install auditjs -g

Settings
#

npm config [--global] set|delete strict-ssl false|true
npm config [--global] set|delete cafile CAFILE
npm config [--global] set|delete proxy PROXY
npm config [--global] set|delete https-proxy PROXY

Ignore certificates
#

npm config set strict-ssl false

Set loglevel
#

npm config set loglevel error