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react字符串匹配關(guān)鍵字高亮問題

更新時(shí)間：2022年12月02日 10:09:05 作者：狗蛋今天睡醒了嗎

這篇文章主要介紹了react字符串匹配關(guān)鍵字高亮問題，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教

react字符串匹配關(guān)鍵字高亮

const sqlstring = ["ADD","ALL","ALTER","ANALYZE","AND","AS","ASC","ASENSITIVE","BEFORE","BETWEEN","BIGINT","BINARY","BLOB","BOTH","BY","CALL","CASCADE","CASE","CHANGE","CHAR","CHARACTER","CHECK","COLLATE","COLUMN","CONDITION","CONNECTION","CONSTRAINT","CONTINUE","CONVERT","CREATE","CROSS","CURRENT_DATE","CURRENT_TIME","CURRENT_TIMESTAMP","CURRENT_USER","CURSOR","DATABASE","DATABASES","DAY_HOUR","DAY_MICROSECOND","DAY_MINUTE","DAY_SECOND","DEC","DECIMAL","DECLARE","DEFAULT","DELAYED","DELETE","DESC","DESCRIBE","DETERMINISTIC","DISTINCT","DISTINCTROW","DIV","DOUBLE","DROP","DUAL","EACH","ELSE","ELSEIF","ENCLOSED","ESCAPED","EXISTS","EXIT","EXPLAIN","FALSE","FETCH","FLOAT","FLOAT4","FLOAT8","FOR","FORCE","FOREIGN","FROM","FULLTEXT","GRANT","GROUP","HAVING","HIGH_PRIORITY","HOUR_MICROSECOND","HOUR_MINUTE","HOUR_SECOND","IF","IGNORE","IN","INDEX","INFILE","INNER","INOUT","INSENSITIVE","INSERT","INT","INT1","INT2","INT3","INT4","INT8","INTEGER","INTERVAL","INTO","IS","ITERATE","JOIN","KEY","KEYS","KILL","LEADING","LEAVE","LEFT","LIKE","LIMIT","LINEAR","LINES","LOAD","LOCALTIME","LOCALTIMESTAMP","LOCK","LONG","LONGBLOB","LONGTEXT","LOOP","LOW_PRIORITY","MATCH","MEDIUMBLOB","MEDIUMINT","MEDIUMTEXT","MIDDLEINT","MINUTE_MICROSECOND","MINUTE_SECOND","MOD","MODIFIES","NATURAL","NOT","NO_WRITE_TO_BINLOG","NULL","NUMERIC","ON","OPTIMIZE","OPTION","OPTIONALLY","OR","ORDER","OUT","OUTER","OUTFILE","PRECISION","PRIMARY","PROCEDURE","PURGE","RANGE","READ","READS","REAL","REFERENCES","REGEXP","RELEASE","RENAME","REPEAT","REPLACE","REQUIRE","RESTRICT","RETURN","REVOKE","RIGHT","RLIKE","SCHEMA","SCHEMAS","SECOND_MICROSECOND","SELECT","SENSITIVE","SEPARATOR","SET","SHOW","SMALLINT","SPATIAL","SPECIFIC","SQL","SQLEXCEPTION","SQLSTATE","SQLWARNING","SQL_BIG_RESULT","SQL_CALC_FOUND_ROWS","SQL_SMALL_RESULT","SSL","STARTING","STRAIGHT_JOIN","TABLE","TERMINATED","THEN","TINYBLOB","TINYINT","TINYTEXT","TO","TRAILING","TRIGGER","TRUE","UNDO","UNION","UNIQUE","UNLOCK","UNSIGNED","UPDATE","USAGE","USE","USING","UTC_DATE","UTC_TIME","UTC_TIMESTAMP","VALUES","VARBINARY","VARCHAR","VARCHARACTER","VARYING","WHEN","WHERE","WHILE","WITH","WRITE","X509","XOR","YEAR_MONTH","ZEROFILL"] 
//所有sql關(guān)鍵字
const sqlText = () => {
    let reg ;
    let reg1 = /\(([^)]*)\)/; //括號(hào)中的數(shù)字
    let reg2 = /".+"/; //雙引號(hào)內(nèi)容
    let reg3 = /`.+`/; //反引號(hào)內(nèi)容
    let newstr = 'select * from ? where ? like "%?%" or ? = ? or ? = ? or ? = ? (111) `content`' //實(shí)驗(yàn)用的sql語句
    sqlstring.map(item => {
	    reg = new RegExp(`${item} `, "ig");
	    newstr = newstr.replace(reg, ` <span style='color: #3b91f1;'>$&</span> `)
	    newstr = newstr.replace(reg1, ` <span style='color: #58ca71;'>$&</span> `)
	    newstr = newstr.replace(reg2, ` <span style='color: #f06674;'>$&</span> `)
	    newstr = newstr.replace(reg3, ` <span style='color: #6b808b;'>$&</span> `)
    	//這里替換的前后兩個(gè)變量必須一樣
    	
    })
    let html = {__html:newstr};
    return <div className={styles.sqlStr} dangerouslySetInnerHTML={html}></div> ; 
  }

<Popover placement="rightTop" content={sqlText} trigger="click" visible={true}>
   <Button style={{height: '30px'}} type='primary'>展示SQL語句</Button>
</Popover>
//我的渲染條件比較苛刻，邏輯就是這個(gè)邏輯了

唯一的bug就是正則只要匹配到了就會(huì)變色，如果要求更嚴(yán)謹(jǐn)?shù)脑捬芯空齽t即可

標(biāo)記高亮關(guān)鍵字 react

標(biāo)記指定關(guān)鍵字高亮（以單個(gè)文字、字母為單位，不區(qū)分大小寫）

/**
 * 標(biāo)記指定關(guān)鍵字高亮（以單個(gè)文字、字母為單位，不區(qū)分大小寫）
 * @param {string} text 需要處理的原字符串
 * @param {string} key  需要標(biāo)記的字符串
 */
export function keySingleRender(text, key) {
  if (key && text && typeof text === 'string' && typeof key === 'string') {
    const newTextArr = text.split("").map(t => {
      return key.toLowerCase().indexOf(t.toLowerCase()) > -1 ? `<Fragment class="redTip">${t}</Fragment>` : t;
    });
    const newText = newTextArr.join("");
    return (<span dangerouslySetInnerHTML={{ __html: newText }} />);
  } else {
    return text;
  }
}

標(biāo)記指定關(guān)鍵字高亮（以關(guān)鍵字的特殊字符分隔后的數(shù)組單個(gè)值為單位（以詞組為單位），不區(qū)分大小寫）

/**
 * 標(biāo)記指定關(guān)鍵字高亮（以關(guān)鍵字的特殊字符分隔后的數(shù)組單個(gè)值為單位，不區(qū)分大小寫）
 * @param {string} text 需要處理的原字符串
 * @param {string} key  需要標(biāo)記的字符串關(guān)鍵字
 */
 
// 特殊字符
const specialCharater = new RegExp("[`~!@#$%^&*()\\-+={}':;,\\[\\].<>/?￥…（）_|【】‘；：”“'。，、？\\s]");

export function keyRender(text, key) {
  if (key && text && typeof text === 'string' && typeof key === 'string') {
    const keyArr = key.split(specialCharater).filter(k => k);
    const newText = text.replace(
      new RegExp(keyArr.join("|"), "ig"),
      str => `<Fragment class="redTip">${str}</Fragment>`
    );
    return (<span dangerouslySetInnerHTML={{ __html: newText }} />);
  } else {
    return text;
  }
}

標(biāo)記后端返回的分詞高亮（以指定的任意數(shù)組來高亮文本，不區(qū)分大小寫）

需要高亮的詞組：key = [“成都樂開”,“樂開有限”,“A”]；

文本： text = “成都樂開有限公司a成都成都”;

/**
 * 標(biāo)記指定關(guān)鍵字為紅色（不區(qū)分大小寫）
 * @param {string} text 需要處理的原字符串
 * @param {Array} key  需要標(biāo)記的字符串關(guān)鍵字組成的數(shù)組
 */
export function keyArrRender(text, key) {
  if (text && typeof text === 'string' && Array.isArray(key) && key.length > 0 ) {
    let charIndexCache = {};
    let allKeys = [], matchWords, i;
    let textOrigin = text;
    text = text.toLowerCase();
    for (i = 0; i < key.length; i++) {
      matchWords = text.match(new RegExp(key[i].replace(/([^\w]{1})/ig,"\\$1"), "ig"));
      if(matchWords){
        if(matchWords.length > 1){
          allKeys.push(matchWords);
        }else{
          allKeys.push(matchWords[0]);
        }
      }
    }
    const readChar = (text, word) => {
      let indexStart = text.indexOf(word);
      if(indexStart >= 0){
        let replaceWord = "";
        let indexEnd = indexStart + word.length;
        for (let i = indexStart; i < indexEnd; i++) {
          if(!charIndexCache[i]){
            charIndexCache[i] = text.charAt(i);
          }
          replaceWord += "#";
        }
        text = text.replace(word, replaceWord);
      }
      return text;
    }
    allKeys.forEach(function(word){
      if(typeof word === "string"){
        readChar(text, word.toLowerCase());
      }else{
        let textCopy = text.substring(0);
        for (let i = 0; i < word.length; i++) {
          textCopy = readChar(textCopy, word[i].toLowerCase());
        }
      }
    });
    let word = "", newText = "";
    for(let i = 0, len = text.length; i < len; i ++){
      if(charIndexCache[i]){
        if(!word){
          newText += "<Fragment class='redTip'>";
        }
        word += textOrigin.charAt(i);
        if(i === text.length - 1){
          newText += word + "</Fragment>";
        }
      }else{
        if(word){
          newText += word + "</Fragment>";
          word = "";
        }
        newText += textOrigin.charAt(i);
      }
    }
    return (<span dangerouslySetInnerHTML={{ __html: newText }} />);
  } else {
    return text;
  }
}