[ci] check JavaScript code with `biome` tool (#6711)

* lint js code

* hotfix

* Update .editorconfig
Co-authored-by: James Lamb <jaylamb20@gmail.com>

---------
Co-authored-by: James Lamb <jaylamb20@gmail.com>

.ci/lint-js.sh

+#!/bin/bash
+
+set -e -E -u -o pipefail
+
+biome ci --config-path=./biome.json --diagnostic-level=info --error-on-warnings ./

.ci/test.sh

@@ -103,6 +103,7 @@ if [[ $TASK == "lint" ]]; then
     pwsh -file "./.ci/lint-powershell.ps1" || :
     conda create -q -y -n "${CONDA_ENV}" \
         "${CONDA_PYTHON_REQUIREMENT}" \
+        'biome>=1.9.3' \
         'cmakelint>=1.4.3' \
         'cpplint>=1.6.0' \
         'matplotlib-base>=3.9.1' \
@@ -113,12 +114,14 @@ if [[ $TASK == "lint" ]]; then
         'r-lintr>=3.1.2'
     # shellcheck disable=SC1091
     source activate "${CONDA_ENV}"
-    echo "Linting Python code"
-    bash ./.ci/lint-python.sh || exit 1
+    echo "Linting Python and bash code"
+    bash ./.ci/lint-python-bash.sh || exit 1
     echo "Linting R code"
     Rscript ./.ci/lint-r-code.R "${BUILD_DIRECTORY}" || exit 1
     echo "Linting C++ code"
     bash ./.ci/lint-cpp.sh || exit 1
+    echo "Linting JavaScript code"
+    bash ./.ci/lint-js.sh || exit 1
     exit 0
 fi
 

.editorconfig

 root = true
 
 [*]
-charset=utf-8
+charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
+end_of_line = lf
 indent_style = space
 indent_size = 2
 
-[*.{py,sh,js,ps1}]
+[*.{py,sh,ps1,js,json}]
 indent_size = 4
-line_length = 120
+max_line_length = 120
 skip = external_libs
 known_first_party = lightgbm
 
-# Placeholder files
-[{*.gitkeep,__init__.py}]
-insert_final_newline = none
-
 # Tabs matter for Makefile and .gitmodules
 [{makefile*,Makefile*,*.mk,*.mak,*.makefile,*.Makefile,GNUmakefile,BSDmakefile,make.bat,Makevars*,*.gitmodules}]
 indent_style = tab

biome.json

+{
+    "files": {
+        "ignore": [".mypy_cache/"]
+    },
+    "formatter": {
+        "enabled": true,
+        "useEditorconfig": true
+    },
+    "organizeImports": {
+        "enabled": true
+    },
+    "linter": {
+        "enabled": true,
+        "rules": {
+            "all": true
+        }
+    },
+    "javascript": {
+        "globals": ["$"]
+    }
+}

docs/_static/js/script.js

-$(function() {
+$(() => {
     /* Use wider container for the page content */
-    $('.wy-nav-content').each(function() { this.style.setProperty('max-width', 'none', 'important'); });
+    $(".wy-nav-content").each(function () {
+        this.style.setProperty("max-width", "none", "important");
+    });
 
     /* List each class property item on a new line
        https://github.com/microsoft/LightGBM/issues/5073 */
-    if(window.location.pathname.toLocaleLowerCase().indexOf('pythonapi') !== -1) {
-        $('.py.property').each(function() { this.style.setProperty('display', 'inline', 'important'); });
+    if (window.location.pathname.toLocaleLowerCase().indexOf("pythonapi") !== -1) {
+        $(".py.property").each(function () {
+            this.style.setProperty("display", "inline", "important");
+        });
     }
 
     /* Collapse specified sections in the installation guide */
-    if(window.location.pathname.toLocaleLowerCase().indexOf('installation-guide') !== -1) {
-        $('<style>.closed, .opened {cursor: pointer;} .closed:before, .opened:before {font-family: FontAwesome; display: inline-block; padding-right: 6px;} .closed:before {content: "\\f078";} .opened:before {content: "\\f077";}</style>').appendTo('body');
-        var collapsable = [
-            '#build-threadless-version-not-recommended',
-            '#build-mpi-version',
-            '#build-gpu-version',
-            '#build-cuda-version',
-            '#build-java-wrapper',
-            '#build-c-unit-tests'
+    if (window.location.pathname.toLocaleLowerCase().indexOf("installation-guide") !== -1) {
+        $(
+            '<style>.closed, .opened {cursor: pointer;} .closed:before, .opened:before {font-family: FontAwesome; display: inline-block; padding-right: 6px;} .closed:before {content: "\\f078";} .opened:before {content: "\\f077";}</style>',
+        ).appendTo("body");
+        const collapsable = [
+            "#build-threadless-version-not-recommended",
+            "#build-mpi-version",
+            "#build-gpu-version",
+            "#build-cuda-version",
+            "#build-java-wrapper",
+            "#build-c-unit-tests",
         ];
-        $.each(collapsable, function(_, val) {
-            var header = val + ' > :header:first';
-            var content = val + ' :not(:header:first)';
-            $(header).addClass('closed');
+        $.each(collapsable, (_, val) => {
+            const header = `${val} > :header:first`;
+            const content = `${val} :not(:header:first)`;
+            $(header).addClass("closed");
             $(content).hide();
-            $(header).click(function() {
-                $(header).toggleClass('closed opened');
+            $(header).click(() => {
+                $(header).toggleClass("closed opened");
                 $(content).slideToggle(0);
             });
         });
         /* Uncollapse parent sections when nested section is specified in the URL or before navigate to it from navbar */
         function uncollapse(section) {
-            section.parents().each((_, val) => { $(val).children('.closed').click(); });
+            section.parents().each((_, val) => {
+                $(val).children(".closed").click();
+            });
         }
         uncollapse($(window.location.hash));
-        $('.wy-menu.wy-menu-vertical li a.reference.internal').click(function() {
-            uncollapse($($(this).attr('href')));
+        $(".wy-menu.wy-menu-vertical li a.reference.internal").click(function () {
+            uncollapse($($(this).attr("href")));
         });
 
         /* Modify src and href attrs of artifacts badge */
         function modifyBadge(src, href) {
-            $('img[alt="download artifacts"]').each(function() {
+            $('img[alt="download artifacts"]').each(function () {
                 this.src = src;
                 this.parentNode.href = href;
             });
         }
         /* Initialize artifacts badge */
-        modifyBadge('./_static/images/artifacts-fetching.svg', '#');
+        modifyBadge("./_static/images/artifacts-fetching.svg", "#");
         /* Fetch latest buildId and construct artifacts badge */
-        $.getJSON('https://dev.azure.com/lightgbm-ci/lightgbm-ci/_apis/build/builds?branchName=refs/heads/master&resultFilter=succeeded&queryOrder=finishTimeDescending&%24top=1&api-version=7.1-preview.7', function(data) {
-            modifyBadge('./_static/images/artifacts-download.svg',
-                        'https://dev.azure.com/lightgbm-ci/lightgbm-ci/_apis/build/builds/' + data['value'][0]['id'] + '/artifacts?artifactName=PackageAssets&api-version=7.1-preview.5&%24format=zip');
-            });
+        $.getJSON(
+            "https://dev.azure.com/lightgbm-ci/lightgbm-ci/_apis/build/builds?branchName=refs/heads/master&resultFilter=succeeded&queryOrder=finishTimeDescending&%24top=1&api-version=7.1-preview.7",
+            (data) => {
+                modifyBadge(
+                    "./_static/images/artifacts-download.svg",
+                    `https://dev.azure.com/lightgbm-ci/lightgbm-ci/_apis/build/builds/${data.value[0].id}/artifacts?artifactName=PackageAssets&api-version=7.1-preview.5&%24format=zip`,
+                );
+            },
+        );
     }
 });

examples/binary_classification/forced_splits.json

 {
     "feature": 25,
-    "threshold": 1.30,
+    "threshold": 1.3,
     "left": {
         "feature": 26,
         "threshold": 0.85

examples/regression/forced_bins.json

 [
     {
         "feature": 0,
-        "bin_upper_bound": [ 0.3, 0.35, 0.4 ]
+        "bin_upper_bound": [0.3, 0.35, 0.4]
     },
     {
         "feature": 1,
-        "bin_upper_bound": [ -0.1, -0.15, -0.2 ]
+        "bin_upper_bound": [-0.1, -0.15, -0.2]
     }
 ]

examples/regression/forced_bins2.json

 [
     {
         "feature": 0,
-        "bin_upper_bound": [ 0.19, 0.39, 0.59, 0.79 ]
+        "bin_upper_bound": [0.19, 0.39, 0.59, 0.79]
     }
 ]

python-package/README.rst

@@ -286,7 +286,7 @@ To check that a contribution to the package matches its style expectations, run
 
 .. code:: sh
 
-    bash .ci/lint-python.sh
+    bash .ci/lint-python-bash.sh
 
 .. |License| image:: https://img.shields.io/github/license/microsoft/lightgbm.svg
    :target: https://github.com/microsoft/LightGBM/blob/master/LICENSE